improved copy and paste
Definitely the biggest shortcoming in mscore as it stands for me is its poor support for copy and paste. I would very much like to be able to box-select a group of notes- part of a measure, full measure or more- then cut, copy or delete those notes. It seems you can select groups of notes already by SHIFT-left clicking and dragging a box over the desired notes but... thats it. Cut/ Copy / Delete have no effect of the selection. Whilst I'm talking about box select I'd like to see this function made available as the standard broken rectangle select icon in the main toolbar- just to the left of the 'N' maybe?
I've read that although you cannot copy and paste groups of notes you can copy measures but that currently works in a very non-obvious fashion and also it sounds like you can only currently copy one measure to adjacent measures which is very limiting.