I see people often say that they get tired of same old factions.
I never got bothered with that. Its not like Cod or BF that the game is released every year, so it can get repetitive. There are only two and half (CoH online) games in last 12 years.
Either they go ww2, or not.
If they go ww2, there is lack of choice for factions, i mean, who really wants to play with Italians? What do they have that it will make it interesting? Or japan, they were major player, but unless next coh goes naval, japan is in same problem as Italy, very limited choice to play with, it would get bet boring, really fast.
They need to worry about polish(don't mean on Poland and improving gameplay.
And not adding factions that 2 infantry type, one light tank and two different AC would be 80% of their army
combat inside enterable houses, side armor, , more animations (like solders leaning at a wall), maybe different stances and choosable behaviour (like passive / hold fire / attack only when attacked) would be enough for a new coh