I finally finished Curse of the Forsaken campainge for 3th time and I would like to give my review, just like I did for Rise of the Blood Elves. Hope you like it if you time reading it.
Army:
Blood elf army was really great army, but Forsaken army is outstanding. For a start, it's 100% unique like Blood elves since one would have to change few things in Human army to make them 100% different (like Spell breaker and dragonhawk rider spells). Also I love that thing that Forsaken can't regenerate outside of plague

. Anyway I would love to add something about specific units.
Dark ranger- My favorite unit in the army. Love Black and poison arrow. Ghosts are rather useless and can be used only as scout or last stand during the assault. Really balanced(without spider) with BE ranger, NE archer, Rifleman, Headhunter and Crypt fiend.
Dreadguard- I find this unit really great as tanking (while abomination is useful for DPS). However, I think they should be little more expensive.
Apothracy- Real backbone of the army. All it's spells are useful and there is nothing more to say, except it's epic unit.
Meat wagon- Plague is great. Altough, I'm not sure if it would be OP in costum games but, I find it really useful. Not sure sometimes if I kill more enemy units, or mine in battles of that plague.
Val'kyr- Unlike phonex, this is really good ultimate unit. In some things it was OP, like standard Necromancy should be in my opinion only for Scourge Necromancers, but it's not big deal. However, I think when it's on foot spells should be disabled and while flying, armor should be lowered.
Towers- I like them, However, I find Tower with poison arrows and plague tower useless, unlike the other Tower with black arrows and electric tower.
We now need only 2 more heroes to make race complate (one can be Knight of the ebony blade(free death knight(tank)) and the other can be Shadow priest(something like WoW Shadow priest(DPS)))
Laboratory- I think that it's little pointless. Dark ranger's spiders, or ghoul's upgrade are OP, but other upgrades are really good. On the other hand you could add those upgrades in regular buildings,(remove cloud desease and add worms, or add regerative flesh as upgrade in graveyard(on lvl 3), etc.). Like that, you can replace this building instead of teample of the damned, since cult of the damned is not part of the Forsaken).
Chapters:
Chapter 1- Nice Intro, but there is nothing special to talk about it. You showed well how Scourge power is broken in Lordaeron.
Chapter 2- I liked this. Unusual map and for some reason really challenging. Those worgens were awesome and I can't wait to see them in The Shadow of Blood.
Chapter 3- Again nothing special here however, I really love New hero Grand Apthracy(if i spelled correctly), but, I got feeling it's very simular to hero Goblin alchemist but, it's even better and I love that model.
Chapter 4- Little unbalanced. Not in term that enemy is stronger and it's impossible the win but, Vermatheras is attacked only from one side and has way to heal it self, while Sylvanas is attacked from 2 sides and has no way to heal troops. It was REALLY hard, but I won in the end. Defeating balnazzar was strangly easy, because he has no anti-air units.
Chapter 5- The hardest missions I ever played, but unlike fury of the sunwell it was possible to win. Garrosh has nice spells, but I think he should have armour 5-6, not 4. Congrutelation for making Jaina(archmage) finally useful. Archmage is at last decant hero, unlike original one which is the worst hero in my opinion. Great mission overall.
Chapter 6- It was hard to secure base coz you start with next to nothing, but it's nothing I can't handle. I love how you recapture your bases. Thrall speech, charge on the Undercity, going trough throne chamber and fight against Verimatheras, is EPIC. No word can't describe that awesomeness. ps. I love how worgens, ignored Dark Lady as we know that she will "punish" them for that.
Chapter 7- I must say that cinematic was great and I love that Lament of the Highborn. As Mission itself, I love how Dark Lady and Phaelynne land on same spot where Arthas landed to defend Frozen throne. I really love that this mission, actually gave me opportunity, to taste something like costum game with Forsaken (at least I felt like it was). However, you should fix gold mine to the north of your mine base, since there is not enough space to build HQ.
Chapter 8- Blood Queen was nice, but that part when you run from Arthas was amaizing. I was cursing all the way while escaping and trust me my language has the most bad words in the world. I love Verresa since she is like "hero archer"(Pristess of the Moon style). However, I think that her ultimate abillity dosen't suit her. I like that spell, but maybe something like strong multishot, or starfall could be better.
Chapter 9- Standard dungeon, nothing to special. Fight with Anub'arak was really good. Varian is really great hero

Chapter 10- My favorite mission of this campainge. Funny thing is that Alliance and Horde were overrun by the time I destroyed Kel'thuzad (which is 45 min into this mission).
Chapter 11- That speech is the reason why I love Sylvanas. If Blizzard kill her, I'm going to be really pissed of

. Anyway, mission was really hard which is always nice, but Alliance did more damage then me.
Chapter 12- This was really intresting mission. I was able to kill every boss but my, units would suffer heavy damage, so I am ashamed to say that I cheated with greedisgood. Lich King was ultimate boss and I waited for this 10 years and it was worth it.
Bugs:
1. Meat wagon produces skeletons, altough I understand you couldn't fix it, but it's ULTRA MINI bug(if we can call this a bug)
2. Blood Elves use Farstrider lodge as HQ, instead of Spire which is kinda odd.
3. Blood Knights use Nisha voice or Liadrin, instead of Blood Elf female voice, but maybe it was intentional.
4. For some strange reason, Thrall and Ayewin mixed their voices. It was funny to hear Thrall saying "Glory to the Sin'dorei" and Ayewin "Your time has come!", but i would still love their original voices back
This is truly epic project. I can't wait for The Shadow of Blood. Do you know when will you finish it (for example will you finish it by the end of jun)
When I got more time and learn more about world editor I will try to make your races playable in costum games and another campaigne based on vanilla World of Warcraft(Varian restored to the throne, Forsaken join the Horde, Kel'thuzad attacks Undercity and Stormwind)