The reason I'm hopeful is that to make FC Studio 64-bit they had to have re-written the whole program in Cocoa programing.
I don't know if they did that, but look at the features. A LOT of them are background technology: New codecs supported, Compressor works with Final Cut without tying it up, and Compressor supports burning.
Those feel (to me) like the kinds of things you'd do during a re-write. Things like 'new timecode' windows can be tacked on as an update, but a lot of these other features suggest that they did overhaul the whole program from the bottom up, which suggests the Cocoa re-write.
Just guesses, we'll have to wait for someone to test it in the real world to know for sure.