VB3m runs great on without hickups on my iPadMini2, iPhone7 and 2017 iPadPro10.5.
AUM and streambyter or Mozaic is the answer to all that is still missing in VB3m.
Running VB3m AUv3 in AUM You can set the buffer settings, store presets, filter channels
etc. You can write all Your mappings in Mozaic and be done.
VB3m is a lot lighter on resources than B-3X. I have VB3m and Korg Module
with all in-apps steadily running in AUM for really exellent sound expander for
My Yamaha MoXF8. Old iPadMini2 16Gb velcroed on MoXF, lightning-to-USB3 adapter,
USB B to USB A from MoXF to host-port for MIDI and audio
USB A to Lightning for extra power from MoXF USB A port.
No real drawbars, but I can use the on-screen ones.