well, there could be made group penalty zeal (like it was done to pios in CoH1) each blob (starting with 2 squads) that are in radius of 10 metres gain penalty zeal that these squads gets 5% received accuracy penalty and 5% more for each squad nearby, up to 5 stacks. I think that would be nice idea
before patch, ass engies were totally useless vs everything, now they are buffed and i believe they are working as ass grens but they get better with late game (and flamer upgrade)
I believe fuel costs on call-ins is a problem, because right now it forces you to go Tier units or doctrine units, in CoH1 you could get Tiger in late game for 800 MP and that was fair and you could get some other tanks too from tiers, CoH2 is one sided in terms of tiers, call-ins or tiers, never both (talking about small matches like 1v1)