Focus on multiplayer - the destroyer of enjoyment and the birther of frustration - it is so weird that Relic devs still don't understand that over half of players want to play single-player like Dark Crusade or Soulstorm, or co-op. Why didn't you expand and polish the Dark Crusade concept, why?!
Absolutely atrocious DoW3 campaign, the worst by far. Not only is it exceedingly linear, but it has no faction coherency - you play every other mission as a different race, even if you don't want to! How the hell would anyone think that completely removing player agency would ever be a good idea, simply baffling!
Stripped features: sync kills, cover, destructibility, garrisoning, suppression, unit experience(which makes units disposable like in decrepit Starcraft 2). It's like Relic had an internal competition over degrading the game, making it arcadey and dumb like that horrible Starcraft 2 crap!
Seriously, if someone at the top Relic management is not fired over this fiasco it would be wise to not even consider Relic's past games as something to give them benefit of doubt in their future projects.