There are many aspects in which editing MIDi is easier and more intuitive in Ableton than Cubase, I realise all the big powerful functions are all in Cubase but I just find editing MIDI in Ableton so much less frustrating,
For those who use both tools - a mode whereby where possible the piano roll just behaves like Ableton -for example in being able to audition ALL notes that the mouse selection cursor drags over - would make life easier.