Everone wants this! Alas, choice HAS hurt the open source. Devs are spread thin across dozens if not hundreds of projects, many feeling half-finished.
I've been diving into Blender lately, and I think there is a lot of potential for it as a "hub" for creating alternatives. I like for instance how its API can be utilized by other software (e.g. Openshot can use it to generate titles). Building new tools around something like this promotes interoperability, and is probably easier!