editing durations

You're still thinking of it in a way that that makes it seem more complicated than it is, and causes you to fight it rather than work with it. Don't think of MuseScore as doing "auto filling". Think of it as *keeping the note you entered right you you put them*. If you enter a note on beat 4, it stays on beat four despite changes you make earlier in the measure. In other words, MsueScore is not *auto fixing" anything. It is instead keeping everything exactly as you entered it. If you are thinking it is automatically doing something, then you arne't udnerstanding how it is working, and that is why its behavior keeps seeming surprising, but the moment you "get" how it works, it all becomes incredibly simple.

Anyhow, yes, Finale does work differently, but it isn't better, and it actually turns out to be less efficient in most cases like this. That's because when you change the duration of a single note, it *does* move some numebr of subsequent notes ealrier or later in time to compensate - thus "auto fixing" their start positions - but it's almost never the right number of notes that moves, and it never knwos what to do with the notes at the end of the measure, so you are constantly having to fix up the things it guessed wrong on. Finale is no more capable of reading minds than MuseScore is, after all.

I don't see what drag & drop has to do with anything here. It's not really an efficient way of doing anything - double click is the much faster way of entering elements from a palette in MuseScore or pretty much any other program - but drag & drop *does* work to add palette items. I don't understand your comment about right click, either. Right click menus can bring up dialog boxes, but that's not an efficient way of editing note properties - the Inspector is more efficient because it can stay up at all times and thus allow multiple operations on multiple selections without needing to constantly open and close dialogs via a right click menu.