I agree that Super Gary does help bypass the “supply chain” of stetzones…but that also is one more reason that Stetmann is a little too reliant on Super Gary, which the devs have admitted is more reliance than they feel is ideal (https://us.forums.blizzard.com/en/sc2/t/co-op-mission-update-december-16th-2019/6571)
I’m also not sure I was clear about what I meant in my points about the multiple simultaneous research and the purple egonergy zone.
My point is not that those mechanics are weak, or need to be buffed: it’s that they only seem to exist because Stetmann was given baseline nerfs. Simultaneous research would be pointless if he weren’t limited in the number of structures he can build (why waste a levelling talent on an ability that simply brings him “up to par” with other commanders?), and the purple zone would be less vital if all his units didn’t effectively have a baseline nerf (down to 0) to their passive energy regen.
All in all you’re right–and clearly Blizz has made some steps towards addressing some of my gripes with him. Even still, some of his mechanics just seem underwhelming and in need of attention.