Even as TVHeadend under chewitt's new participation will become even more of a focus for LE, I am hoping that there would be an option to use NextPVR if an appliance mode is considered and I would really like to be involved.
I have an interest in both projects, but I have no interest in forcing either project on the other. If LE decides to do or allow more with PVR then it will always be a team decision; but one that's ultimately driven by people showing up on GitHub with some quality pull requests to add the required changes. We (maintainers) are risk averse and will want to have a clear vision for how things will look and work - at both user-storyboard and code levels. Please also understand that LE has history with new-ish people showing up and trying to push poorly considered changes into our codebase (our indigestion on the experience and their intollerance resulted in CE) and there's a current and live example unfolding in Team Kodi at the moment with a well intended feature impacting a release cycle and needing a massive group effort to fixup code that (with the benefit of hindsight) shouldn't have been merged so quickly.
DeltaMikeCharlie I'll ping Jason offline to see if he has any plans for the add-on, but if it's unmaintained for two years we prob. already have an answer. You don't have to reuse it, but if it's already a reasonable match for where you wanted to go with things adapting prior art is often faster than writing from scratch. Your call entirely.