I completely agree that in order for this to be a winner they need to stick to the original CoH formula. CoH1 even with its relatively small scale got to be pretty epic.
Now, what I would not mind is a increase in the number of individual units in a squad accompanied by the same decrease in durability. One of the ridiculous things about Company of Heroes is that two squads could stay firing at each other at point blank range for over 10 seconds (depends on the squads) and they'd never die. I wouldn't mind seeing some tweaking in this area.
Upping the ante on terrain dynamics is completely and totally awesome. Because you're not changing any of the style of the game (as terrain dynamics was quite important in CoH1).
But yes, stick to CoH1!