Yeah, Studio One is not up to CbB's MIDI capabilities. TBF Cakewalk started out as a MIDI sequencer decades before Studio One was even born.
I'm less and less a MIDI guys these days. And where I am is using EZKeys, EZDrummer and Superior 3 with minor edits. And then only to give a live drummer or keyboard player a basic idea of where to go.
I have EZBass but since that's my main instrument for over 50 years now EZBass is just a thing to have in the locker (just in case).