Yeah, I have another Karax variant that has timed lives on the Cannons, Batteries, and Pylons with a sub-variant that also has the Cannons and Batteries lose Health over their duration like Xul's Skeletons - requiring Power Grid's shielding to prevent them from dying quickly (self-damage mechanic bypasses Power Grid's shielding in the spirit of cutting down on "visual clutter".). I would say that Photon Cannons would move to a maximum upkeep limit, but I prefer to keep that...

I'm 300+ unique concepts down the rabbit hole, if I want each hero to be distinctive then I can't use shallow mechanics. Otherwise I'll have heroes with redundant abilities. I'm fine with generic talents though, because it would be a nightmare to make 17+ unique talents per hero after the 75th~ mark. I would have stayed on the official forums, but when I tried to update my KT thread there it bugged out and I got another 404 error, so I don't go there to waste time anymore.