Well since you’re asking, I realise it’s a big ask, but feature parity with PlexAmp’s automatic playlisting features. It’s been asked before… Valence has never worked for me, but SuperSonic has, and it’s been quite remarkable at what it does. Mobile is a use case where hands-off is really nice, and it’d be really nice to have the type of experience that’s described here, without all the compromises that come with PlexAmp.
Live radio would also be great.
I’ve also generally found PlexAmp to be more reliable on mobile, but my hunch is that it’s mostly a question of maturity. I’d much rather use ARC, UI-wise, and moreso now that there’s DSP baked in, but the “little” stuff like ARC crashing in CarPlay makes me reach for PlexAmp rather than ARC when I don’t feel like beta-testing something.