Dicky, I agree with you. Roland had a great MIDI editing tool. I think it was called Make up tools. Unfortunately, there is no more Roland and we have to come to terms with that.
At Yamaha, such work can be done on a computer. It may seem complicated to connect the keyboard and the computer, but once you get used to it, it works without any problems. watch the video

Yamaha Midi File (SONG) - editing drum with XG Works