as an drummer using exclusively musescore for my drumming blog (http://blog-batteur-debutant.fr) to write my drum scores, and I also made some educational videos about how to use the drum notation from MuseScore (http://youtu.be/UgSE4ragKWU, and http://youtu.be/Zo6AAuVDNmU)
I would like to make some suggestions for improvements.
Even though there are no standardised drum notation, the only one which comes the closest from it is the initiative of Norman Weinberg http://www.percussiontoday.com/filer/notation.pdf
He wrote a book about it : http://www.amazon.fr/Standardized-Drumset-Notation-Norman-Weinberg/dp/0…
With having let's say the 3-5 most used cymbals (crash, ride,splash, china), hi-hat (open, semi-open, closed), 5 toms, snare stokes (normal, x-stick, rimshot), up to 5 tom-toms, and 2 bass drum, I think it will suit to 95% of every drummer's need.
The English ghost note notation (with parenthesis) would also be a great asset.
But the ultimate killer feature for me, would be to be able to define my own keyboard short cuts, not being restricted to the 6 available. Because 6 keyboard shortcuts are easily reached while writing drum score.
Ideally, one could think about having a panel to define "custom keyboard shortcuts" with key combination, and associates these shortcuts with advances head notation, such as for instance chocked cymbals, or flam notation, xstick stoke on the tom-toms ...