Here are some features I´d like to see:
1. Synchronization with the DAW´s transport and tempo (tempo changes) (btw: Toontrack is able to do this)
2. Allow multiple instances to be loaded in a DAW
3. Audio output through the Channel where the plug-in is inserted (incl. use of FX plug-ins in that specific channel (e.g.Amplitube))
4. Multiple instances of BiaB plug-in allowed in DAW
5. All features (hold, shot, push....) chord input,...
6. Fast regeneration
These are not features - these are what is expected as a minimum.