You actually CAN adapt a division that is weak e.g. in forest to be more effective in that. and not only at high cost or only a bit. But its good!
I have made an impressive experience with the 17.SS on Mont Ormel, where I have seen, that the forest soakes a lof of infantry from you, but the one running out first will be the looser, so I dropped 2 packets of infantry, and tried to play with only like 10squads in phase A, and 1-2 packs in phase B (some storm pioneers to tidy up the rest, I have seen many people pointing it out like that).
The wonder was: With less infantry I was more effective, because I used more light vehicles and artillery and mortars, and that did do the trick.
So I am of the opinion (and made experience and observations), that you have generally and lawishly through ALL divisions much power, to play a weakness of a division THAT well, that you can more than just e.g. survive, if you have a weak phase A in your division, that 12.SS, 17.SS and to some part also 91.LL seemingly have, but you can trick the weakness, to even clear the map decisively, and even against higher income. It also works against humans.
My best hope is that the people understand that the adapting is possible, that would make the game so much interesting, nerfing the game would be very sad for the game.