One thing I really didn't like in DoWII was the decreased unit count and the removal of synchronized kill animations on every melee kill.
Actually DoWII did have sync kills but they only happened about 2/10s of the time and presented an issue when you were chasing down enemies with melee and getting tangled up because of a chance sync kill where this wasn't really an issue in DoWI as everyone had them.
If we ever do get a DoWIII I'd like it if they could bring back the increased unit count and the sync kills that made melee combat really fun to watch.
The game is more balanced than DoW1 though. And you do get plenty of sync kills in every match.