When it released I did not like Neverwinter Nights 2. It wasn’t what I wanted from a sequel and it was demanding and didn’t run well on my PC then. On Deck though I think it runs super well and I actually got much farther in it than I ever got in the past. I don’t know why it got delisted but it’s a shame.
As for games I wish I had on Steam but don’t, it’s Rocket League. I kick myself for not buying it when I could. Yes there are ways to get the other launchers going, and rather easily, but I prefer native steam games where possible (for max convenience) and there’s nothing else in the epic store to warrant the hassle of setting up heroic or whatever.
Transformers devastation, war for/ fall of Cybertron, several of the need for speed games are the ones I know off the top of my head. I haven’t really checked if other games I enjoy are still in the store.