1) There is almost always a conflict on channel 9 "percussion" channel. If playing styles on standard GM compatible synth.
I feel this can easily be remapped within vArranger with 1-3 rules that would play correct instrument (percussion) and correct-remapped keys IF the GM or GM2 mode is selected for MIDI out, without manually tweaking things on actual Synth.
2) In song chord sheet, breaks/fills should be available for partial bar beats. Meaning, manually I can start a fill in a middle of the bar, in "Song chords" sheet I can not input the offset break.