I think it would be great if the copy-function was better. I'm talking about when you right-click a measure and the "copy" at the menu. 

I think it would be great if there was a slide menu there, giving you multiple option of what to copy like. Only copying expressions, dynamics, lyrics, chords etc. It would be a lot more accessible as some copy-functions are scattered at different places - copy normal stuff just ctrl-c ctrl-v, copy hairpins and cresc., go to the edit menu and edit filter and chose a specific filter, then ctrl-c ctrl-v, copy lyrics use the lyrics tool then clone lyrics. 

Would be more handy having all of them at one place.