Your point? "Theoretically if it was balanced 1v1 if would be balanced 4v4"
Where is the correlation in that? Having a counter cheese combination doesn't mean it is balanced, because it is overpowered over other play styles.
What you are implying is you could simply do some cheese tactic even if it was balanced 1v1 in 4v4 and somehow that makes it not balanced or as if there isn't counter-play.
What tactics do you think you could do 4v4 that is uncounterable exactly?
If it was balanced 1v1 I think it would be balanced 4v4, I'm not sure there is a comprehensive way to prove this, I guess mirrored classes would be good for example only, if there are 4 mirrored classes how would it not be balanced?