Eh Lemon, 2v2 I guess is a bit different with the maps offering better lanes plus higher unit density, but I'll say categorically, in 1s, Guard Motor was the strongest individual commander prepatch, and it only got stronger...and this leads me to believe that their balance lead must not play his own game.
Yes since guards got AI buff T1 Guard Motor "mollo type strats" has been "OP" in 1vs1 against Werh combined arms, 2vs2 not really. Top players that like to use combined arms like Luvnest die to T1 mollo strats/guard motor all the time because Werh T2 except maybe pak guns are not very rewarding against 4 guards and 5+ M3s that stall for call ins.
Luvnest is one of the best 1vs1 players to use Werh combined arms (T1+T2+T3) and thats sorta playstyle just dont work good against these type of Guard Motor strats which is lame.
The whole point of the patch was to promote combined arms so yes 1vs1 Guard Motor need a nerf so soviet actual have to tech.
Currently to beat T1 Guard Motor with M3/guard spam in 1vs1 all you need is:
gren, gren, gren, gren, gren, gren

Sometimes perhabs a sniper if soviet like to use sandbags. Maybe some s-mines and then the game is usual over within 10 minutes (unless soviet get squad wipes).
Yes in 2vs2 you got "lanes" which allow combined arms but in 1vs1 if Werh try to actual take some map control and spread out, well thats not going to work against M3/guard spam.