Dear Steinburg,
C_Brains is brilliant. If you aren’t familiar with it, get familiar. 
It’s great, but it slows down Cubase performance. Is this your fault? No.
But…
Cubase iC Pro? Please, invest in better iPad control for Cubase: Audio & MIDI. If we can work faster, with less hassle, then we get more work done. The faster I can work in Cubase, the more no other DAW can replace it as my go-to tool. 
Thanks,
Sean