Epic hasn't gone out of their way to make life hard for Legendary/Heroic, yet. I guess that is a kind of support.
My biggest regret with Epic is buying Eastward there, and then whoops the DLC sidestory is available on every store but there. I can only read that as meaning "nobody makes money selling games, to the end user, on EGS. The only money you'll make is from selling directly to Tim Epic for a giveaway or an exclusive."
Am I going to put any more money in Epic? No. Am I going to take the freebies? Sure.
The thing that I would keep an eye out for is if Valve ever does a refresh with a VRR panel. With VRR, you don't need to have "so much excess GPU power that it's impossible to miss a rendering deadline".