On the first part it would be so useful to have a midi file preview. You could pick a instrument from Microsonic to preview the midi file. I have a large selection on midi beats i use to program my drums since ios does not have a good alternative to Toontrack EZdrummer.
Since Cubasis does not have a midi preview i have to use Helium as a alternative. But dropping midi file from Helium to the Cubasis timeline does not work 80% of the time. It was fixed when i sent you a video about this in the past @LSlowak but it broke again.