I will give my review, without watching any already posted review
I had to replay the first two missions, otherwise Kel'Thuzad doesn't appear in the third mission
-Cinderwave doesn't work the way I think you want. Let me explain: if I order Kel'thuzad to use it against an unit, he will launch the attack very far away from the target and the wave doesn't even hit the target
Second mission
-The plural for Dwarf is Dwarves not Dwarfs
-The Blackrock Clan and Dragonmaw Clan thave both red as team color
-"Burned down" not "Burn down"
-"So it is true. Is the crystal"
-If I click Esc to pass the final cinematic, Kel'Thuzad appears outside of the village, where he started after the fountain cinematic.
Third mission
-The Loading screen has to be fixed
-Some grammar fixes needed
-The noxious smoke deals too much damage if you ask me.
-Fix the cinematic so that we can use Esc to pass it
-There is an area with orcs that we can't reach. Why?
-What is the purpose of the notes?
-While you putted useful items on the map, the amount you putted makes it hard to choose which should we keep for future missions
-Deathwing flies to one direction and then to the opposite. Why?
Lore:
Kel'Thuzad will only leave the Kirin Tor ten years after the attack on Dalaran. And where would he go? Ner'zhul still isn't the Lich King so he will not go to Northrend. And he leaving Dalaran during an orc attack sounds a little ridiculous for him to do.
I reviewed some parts and this is what I got: Kel'Thuzad was respected by his peers, as he was described as being charismatic. The only thing about him that annoyed others was his insatiable thirst for knowledge, as he constantly pressed Khadgar for information regarding Medivh and his knowledge. He also was far more open-minded than most concerning what kind of magic they should use and even showed some disdain towards the Church since they had the tendency to berate the Kirin Tor for their studies.
During the final years on the Kirin Tor, he grew infuriated because the other mages didn't share his opnions, so he kept his studies in secret. He found it his duty to study necromancy so that they could use it in case the orcs returned. Antonidas said that the orcs will never break free from the camps (joke is on Antonidas!) and deemed Kel'Thuzad's studies too dangerous for Kirin Tor's reputation and threatened him with exile. Kel'Thuzad had enough of living in a city filled with short-sighted and close-minded mages and left to meet the voice that has been whispering in his head.
I had to replay the first two missions, otherwise Kel'Thuzad doesn't appear in the third mission
(Yes, you need. That's a problem? if you play with the mission normally-[final version], the campaign mission buttons will appear when the previous map is completed. In the test, "for shortcuts" you have a generated Kel from your previous map. [I made them in the current file I working on])
-Cinderwave doesn't work the way I think you want. Let me explain: if I order Kel'thuzad to use it against an unit, he will launch the attack very far away from the target and the wave doesn't even hit the target
( I don't know what you're talking about, it works as the shockwave ability from the Tauren Chieftain. )
Second mission
-The plural for Dwarf is Dwarves not Dwarfs
(fixed)
-The Blackrock Clan and Dragonmaw Clan thave both red as team color
(yes, i made them both red, that's a problem? Why do I need to change that?)
-"Burned down" not "Burn down"
(fixed)
-"So it is true. Is the crystal"
(fixed)
-If I click Esc to pass the final cinematic, Kel'Thuzad appears outside of the village, where he started after the fountain cinematic.
(No such thing happened to me. "As far as I know it works perfectly in 1.27")
Third mission
-The Loading screen has to be fixed
(I will create own Loading Screens for the campaign when I will complete every map in it.)
-Some grammar fixes needed
(You can help me find every of them? I am not proficient in English.)
-The noxious smoke deals too much damage if you ask me.
(fixed: It deals only 10 damage per sec)
-Fix the cinematic so that we can use Esc to pass it
(fixed/created)
-There is an area with orcs that we can't reach. Why?
(I fill up that area with some skeletons, Necrolytes, 2 items, 1 rune, and another gas smog [With an item in it])
-What is the purpose of the notes?
(removed: That was a plan to put a dialogue where Kel must use a Power Generator at the Tracey's Armory to solve a puzzle, but i dropped that idea.)
-While you putted useful items on the map, the amount you putted makes it hard to choose which should we keep for future missions
(remove: Ring of Protection +2; Claws of Attack +3; Runed Gauntlets; but added: Orb of Lightning; Perhiapt of Vitality +150 HP.)
-Deathwing flies to one direction and then to the opposite. Why?
(fixed)
Lore:
Kel'Thuzad will only leave the Kirin Tor ten years after the attack on Dalaran. And where would he go? Ner'zhul still isn't the Lich King so he will not go to Northrend. And he leaving Dalaran during an orc attack sounds a little ridiculous for him to do.
I reviewed some parts and this is what I got: Kel'Thuzad was respected by his peers, as he was described as being charismatic. The only thing about him that annoyed others was his insatiable thirst for knowledge, as he constantly pressed Khadgar for information regarding Medivh and his knowledge. He also was far more open-minded than most concerning what kind of magic they should use and even showed some disdain towards the Church since they had the tendency to berate the Kirin Tor for their studies.
During the final years on the Kirin Tor, he grew infuriated because the other mages didn't share his opnions, so he kept his studies in secret. He found it his duty to study necromancy so that they could use it in case the orcs returned. Antonidas said that the orcs will never break free from the camps (joke is on Antonidas!) and deemed Kel'Thuzad's studies too dangerous for Kirin Tor's reputation and threatened him with exile. Kel'Thuzad had enough of living in a city filled with short-sighted and close-minded mages and left to meet the voice that has been whispering in his head.
(Thank you very much for your observations and offers. I'll take them into consideration. I'm trying to fix everything you say, but I'm not sure I can do anything. What do you think of Interlude, Kel'Thuzad speaks with the Council after 10 years because they have discovered that Kel'Thuzad is further dealing with necromancy?)
And sorry for the late answer again. If you saw that I'm looking at the post but I'm not responding, it's not because I did not want to answer it, but on my tablet, the hiveworkshop was opened at this page and because it was turned on, it showed me online.
... Originally, before this, the council find out what Kel'Thuzad really does, the necromancy. And then this happens.. 
