My guess for the best of both worlds would be the FP90 with a BK7M module or maybe module from Kentron. If you need more editing, midi zones, etc then the 2000 with a module would be a great setup.
I agree that when the manufactuers come up with a hybrid they don't put the best they have in the keyboards.
its a good setup for sure... however, the bk7m is getting old soundwise compared to for example the Ketron SD40
The FP90, is less suited as a midi controller then the Roland RD2000... and people seem to forget about the Montage 8, that can do anything the RD2000 can but also comes with a huge amount of other realtime performance tools..
however even tough the Montage 8 has superb action, it still falls short of the Roland action..