Although one of the major reasons large teams games are considerably borked in CoH2 has to do with the available assets for map making.
CoH2 Montargis Region
https://www.coh2.org/file/14235/mr2.jpg
CoH1 Montargis Region
http://cohonlinegame.ru/images/content/maps/montargis_region.jpg
Look at the number of territory points. Look at how resources are distributed.
The CoH2 is in annihilation mode too, so the VPs are resource points on that one, and it doesn't show cutoff sectors. But the point is the lack of territory/resource point options completely restricts layouts in a way that really don't extend beyond a 2v2. And even that's stretching it. Even 1v1 maps are extremely limited in their potential designs.
All of this has completely prior to any faction or game match.
Cache costing more with each player beyond 2 was in community mod patch.
People freaked out. I like it though.
It delays tanks and makes infantry play last longer. More interesting.