Paolo, while you're waiting for this wish-list item to be implemented, I guess you already know about the CC-assignable Tuning (Master Concert Pitch) parameter in Synchron Player?
I'd agree that using MIDI CC-controlled Pitchbend in both VI Pro and Synchron Players would be handy for you, but wouldn't (Master Concert Pitch) Tuning in Synchron Player provide a workaround for you for now?
Master Concert Pitch (labelled as "Tuning" in the parameter list in the perform tab) gives a range of about +77c to -81c: i.e. not only adequate range but also slightly better precision than the ± 100c Pitchbend range when assigned to a 7-bit MIDI CC (given that different MIDI CC scaling is used for each of course); in practice that's not too bad.
Just a thought.