I noticed D&D Neverwinter is f2p on PS4, so I am giving that a try. It's pretty basic, overall. Not lame, but not enthralling yet by any means. Big world, lots of little jobs. The UI does weird stuff, where it shows systemwide notifications in the originating player's language, so stuff in Italian, French, and German shows up in the middle of my screen, blocking my view of an active enemy.
I played a fair amount of Happy Wars on 360, and Toylogic's sequel, Happy Dungeons just came out on PS4. For a sequel to an online game using many of the same systems, it's remarkably incompetent in dealing with load, streaming, and concurrent users. I'm hoping they will patch soon, because they've hit 2M downloads, but I can't see anyone sticking with it when play is choppy as a chopped park chop.