Option to automatically change the note length of new midi notes to the same as the last note entered. So if note length is currently at 1/16, then you enter a 1/16 and drag it to 1/8 the length will change automatically so that all future notes entered will be 1/8. This is nice quick time saver. Again, this would be option to enable/disable.
Another nice option would be double clicking notes would delete them vs having to choose eraser, or highlight and then press delete. Again, user preference option that could be enabled/disabled per users needs.