I'm not really sure what you'd expect. The core gameplay has already been established and perfected over the first two games. There's really not much more to add, or you'll risk ending up with more Blizzards. The only thing that a sequel needed to do is combine the best of both (resource system from vCoH with flag capture system from CoH2, etc.), tackling the major issues (garrisons, faction tools, etc.), and polish up the things that didn't work too well (side armor, pathing, etc.).
And CoH3 seems well under way to doing just that.
Getting the best stuff out of both games is totally fine, but the game would still only be a "best of". I hope that they at least try for some real novelty.
I'd actually be very happy if something like blizzards, deep snow, mud etc would be implemented again, even in multiplayer.
CoH2 did not properly tie these (especially the blizzards) into other mechanics and the overall pacing of the game. This and the fact that all DLC factions were designed in a semi-broken state lead to CoH2 feeling fairly constrained compared to what the single player offered. Coh2 is a good game and I sunk and still sink a lot of hours into it. But in the end I can't deny that most of the matches feel very similar to each other.
Relic Entertainment
cblanco ★ 
보드카 중대 
VonManteuffel 
Heartless Jäger 
