I would be fine with getting the ability to vet1.
There is a great replay vonasten vs price crossing in the woods. Su76 vs stug spam. I think romeo casted it on his stream. One hour game. And well the popcap from the stug is...
Stugspam won
Why not increase SU76 pop cap aswell...SU76 spam is the real problem not the unit itself. Increasing the pop-cap slightly is going to make it harder to spam without rendering the unit useless.
This post is also about team-games, not 1v1. I have never encountered SU76 spam in 1v1s.