RE -> VST wrapper
My first thought was that it might be possible to create a Rack Extension that's a VST wrapper, as is done for other formats.
However, since Propellerheads probably have the final say on what gets into the store (think Apple), this might not happen since it would not be possible to force all the requirements onto the VST plug-ins, for instance "undo".
VST plug-ins can implement their own undo, but it doesn't come by way of the host. I'm sure there are other differences, however it might be possible to relax those requirements and allow an RE/VST wrapper to exist. You could convert CV to MIDI automation, it would seem, fairly straight forward.