Might be interesting. Will have to wait and see how it develops.
Well, to be fair, Left 4 Dead only had a handful of enemies and bosses, and the maps never really changed. I'm guessing this game is going for that vibe, but with more players and in a fantasy setting.
My only issue from these videos is that the effects were too flashy and made it hard to see what what going on at times, coupled with the player being blocked by just about every teammate.
If it is done well, and has enough variety, then I could see this as a fun co-op romp like L4D or Vermintide.