Yeah, he doesn't look that amazing to me.
I'm looking at Mei's upgrades, they all look a little confusing to me - as far as synergy goes. I've written what I "think" they're for, feel free to correct me:
Price of Progress: killing strategies, Mei's doing a lot of the work.
Vapormancy: a bit of protection from the trigger? Don't see myself using the Action.
Seismic Claws: pretty good melee upgrade, splits enemies apart or pushes them into melee range of something else of yours.
Thunderous Smash: protection from retaliation, as Mei's 3" melee means she can still attack?
What are the synergies here? I can see SC and TS working well together, a bit stuck on the third one I'd take.