In a lot of the percussion work I have done, I find that percussion arrangers have a lot of notation elements that are unique to them as an arranger.
For instance, one person I worked for would use a sizably larger staccato dot over notes to indicate what was to be played as a half accent, as opposed to a full accent. I am sure there are other symbols that could be used. However, it would be nice if there was a way to create your own set of articulations, dynamics, etc. I’m not sure how it would look from the user side since I have yet to get the software (6 days left, I hope), but being able to create and utilize your own symbols would go very far in the work I do.
I’d like to add this to a list of future feature requests.