What specifically is the problem you have with Delphi code? I'd love to know what you feel it's limitations are.
Don't ask me, ask every single DAW company why they don't use Delphi and why they have identical Mac/Win versions released at the same time ?
I know I always say about the "old Delphi" but you see with the Plugin code the Mac/Win both look identical, both have the same features, both are released at the same time. This way the Plugin for both version could be released in Dec, the Mac Plugin would not have to wait for the BBW4.app into the next year.
If you want to "a complete rewrite" you could use Delphi, sure, but why ?
The Plugin is developed quickly without limitations, all the limitations are with the BBW4 side and waiting for a communication line to be added.
The deal is the "OLD" code that has to be modified, I would say that is where the bottle neck is, that these things aren't just "DONE" as they would be if it was ALL done in the Plugin code....