Xavier,
I tried 2.12 Beta 2 and CC7/CC10 do work like a treat! Very, very nice! But it seems like I stumbled across a bug when selecting banks/patches in the DX7 section. If I do accidently select patch Nr. 33 then the PreenFM2 freezes on playing the current waveform and needs to be restarted for recovery (my sequencer starts numbering patches at Nr. 1, so this is exactly one patch above the allowed range for DX-7 banks -- just for clarification. This looks like a missing range-check leading to out-of-bounds memory-access at a first glance.).
With PreenFM2-banks, however, this doesn't happen.