Ch1
W and E mixed up on the hero ability menu (E skill 2nd from left, W skill 3rd from left)
Why does reuniting with her body mean she will become more powerful than ever (including when she was alive?)
Also, like mentioned by other people, the items you gain from this one don't transfer over exactly to the next one. It might be because the Hero is changing (from sylvanas ghost => sylvanas with body).
Maybe try to avoid putting consecutive RPG missions (non-base building ones) next to each other, because it was hard to play through this whole map and then do another in Ch2.
Ch2
Side quest doesn't say how many groups we need to resurrect.
The ghosts Sylvanas can summon don't have slow on auto cast or the death raise skill.
Ch3
Good thing we resurrected builders at the end of 02 so we can do a base mission?
At then end of the cinematic for ending, we can see a tree being cut by a hidden? peasants (can see the tree motion from being hacked at by workers). Also the barges are flying units since we can see their shadow below on the water.
Ch4
Cutscene emphasizes finding a way around the guards blocking the small passage, but we need to kill the general anyway (who is in the small passage) for the silver key to pass through to the end.
Ch5
The dimond artifact item can be triggered manually by clicking on it the one used for protecting from spells every 30 seconds.)
Ch9
The final battle for lorthemar at the ambush can be triggered by sylvanas walking to that spot; lorthemar doesn't actually have to have escorted the caravan to that spot.
That ambush at the end is one of the toughest fights in this campaign, forced to reload many times.
Priest in final cinematic moves in front of lothrarmar since he is trying to heal sylvanas.
Ch11
This would have been a great opportunity for ally AI, instead we need to control 2 bases

Garithos' final attack never came, he might have gotten stuck.
Also, pretty sad how sylvanas worked so hard just to get instant killed by powers she could not stop at all at the interlude before this mission.
General points
Remakes like this are a great way to retell the original blizzard campaign story, since the maps are all reworked and you put in a lot of time to make changes. I just wish there were more ally AI missions instead of them all being player vs everyone. Enjoyed playing this a lot.