There are enough wanting this but the majority of ideas has already been spit out on this forum and your idea is great, but you are not really adding much more to the table here.
One of the suggestions containing a lot of options including clip playing is pinned (meaning that there are useful ideas in it that might come in handy for the devs later):
To sum it in a nutshell:
Though Renoise gets bigger and each new plan requires more thorough testing to see if it is compatible with what already exists (so that songs from older versions still load and play okay).
These compatibility setbacks cause postponing of features until a clever way of integration can be thought out.