Funny, i hear so often that the changes were only for 1vs1 and no changes for teamgames. Most changes were based on 1vs1 btw. So its the opposite from what you say.
To get a teamgame change took very long.
I am sorry but i don't see why the changes are only based on AT teams lol.
If you have a good random it should be the same. TBH sometimes 2-4 randoms are better than a premade team.
Ofc as premade you can fill some gaps, but that was always the case.
If you talk about 1vs1 cup, yes there you see most of the time soviet vs wehr. But if you look at automatch, you can see usa, okw often too. And some brits.
If you look back we had some small patches, nerfing special units because top players abused it in cups.
There were in all the years 2 teamfocused patches.
1. Where the ele and JT lost some damage, so they can't 2 shot TD's anymore. + Jackson got more HP.
2. Commanderrework, like removing stukadivebomb from ele doc or the il2 bomb from isu.
In short: The most changes were for 1vs1, not teamgames! And def. not focused for premade teams.
P.S I will not start here a long discussion. I don't do this in the forum, so don't wondern, if i don't response often back. Sorry. I learned people here in forum have their own opinion and its very very hard to change that.