Well, I played this campaign before, I played it again and now I really should inform you about these problems:
1. The first cinematic is only camera around the bases and Medivh talking, that's not much a cinematic, you can music or something, add Fade out and fade ins
2. In the First chapter, there is no starting cinematic for it, you could even use a cinematic mode that shows the captain has reached there and you could say about that gate and that village in cinematic mode.
3. That village that was razed by orcs where those 2 orc warlocks were wasn't really called a village as I can say, 5 structures and 1 well, you could add some more doodads to improve it's quality.
4. You are in charge of humans but your race options appear as Night Elf.
5. Terrain is also unacceptable and needs much to be improved.
6. Most words in the sentences that were being said were started with capital letters even when they aren't the first word of a sentence, like "I Didn't Even Know You Are Here"
7. The first time you meet a Scarlet Crusader or Captain, he says "Plaque" instead of "Plague" which plaque means something far different with plague, and I know it' only a mistake while typing.
8. As some other people mentioned, the captain isn't hero and has no abilities with large amount of hit point regeneration, you can add a team glow to him, turning him into a hero with XP bar and some warrior fitting abilities like, Block, or Berserk or similar to these.
9. In the last moments of chapter 1, when you are heading to that purple Scarlet Crusade captain, you gain control of another captain, same models, same Icons and same size, that really bugs me.
10. Also a strange thing is I don't recognize the Scarlet Crusade to have dwarves in their group or race.
If I am to rate this campaign, I give 1/5, but I won't since it will really ruin it.