Ability to mount ISO images
Something I would love to see Serviio be able to do: mount an ISO image and play media from within it. If it happens, great; if not, no big deal. But it would be nice for those of us who have archived our discs as ISOs in case we ever wanted to restore to the original media 
BTW, nice job with Serviio - it's easily the best UPnP / DLNA streamer we've used over the course of the past decade or so.

BTW, nice job with Serviio - it's easily the best UPnP / DLNA streamer we've used over the course of the past decade or so.