Maybe in distant future, it would be a good idea to integrate Protoplug (LUA audio processing) into a native Renoise device. Protoplug is opensource and licensed with MIT, so this should be possible. The last available version suffered from native ARM support, but already uses LUA-Jit. Some people already did some research work. Might be a no brainer for developers which are very familiar integrating LUA.
Best approach actually might be the integration into the existing formula device, now providing meta and audio I/O at the same time, doing custom compressors, manglers, stranglers and what not. Next level stuff. Also very interesting for education purposes and a distant Redux FX.
A “proper” editor support then inside the formula device (i.e. support for separate script files, but somewhat saved inside the xrns) seems to be mandatory then.