Hi, I was just looking at the features page of museScore and I can see that it is still on an early stage.
It is very hard to go point by point on what it can do in a visual and orderly way.
A cool way the finale people have dialed with this was by creating a visual index
What is really neat about this is that you can see on a glimpse of an eye what the software can do. and, since is is "interactive" it can also "tell" you how to do it.
But even if it wasn´t really an index it still helps to see if what you are thinking about is possible to do or not with the software. I mean, seeing it is half of the work already.
So basically if someone (not me yet because I´m just getting familiarized with ms) would create a random peace of music with museScore showing all it can do (at the time) and post it it would be very helpful.