Topic: Suggestion!
Based on personal experience, alot of people mainly use frame-interpolation software because they are annoyed by stutter in panning scenes. They however don't like the artifacts and effects it makes in other scenes.
I suggest making an option akin to "adaptive", though one where frames will only be interpolated if a huge amount of high quality motion vectors are present, as in a panning scene.
I don't really have any programming experience so I don't know how plausible this is, but I'd toss it out there anyway