Better drumset notation (with focus on stem direction)

I'm a drummer and drum teacher, and does make quite a few drum sheets. In doing so, I've found the drumset notation in Musescore to have some shortcomings. It works quite well, but with a few changes, it would be absolutely great.

First is a relatively small thing, but quite important. I've never seen open hihat notated on the E space, ever. Only in Musescore. I know I can change this myself, but we the default really should match the standard here (this is one of the few things in drum notation that's quite commonly agreed upon). The common way is to add an "o" over the open hihat:

This means we would need the drum notation input to handle adding articulations. If that is difficult coding wise I have no idea - but that would be very smooth indeed.

Secondly, you don't play congas while playing drumset very often. We could loose those from the presets, I think, they're just clutter.

Third is the big one, and my pet peeve. Currently, the musescore preset conforms to the "hands up, feet down" standars, where hands go in voice 1/stems up and feet goes in voice 2/stems down. This is hardly the standard. It's one standard, but definitely not the only one. Often it's really bad.

There are many ways to do this, but I think there are three major ones:
1: all stems up
2: hands up, feet down
3: cymbals up (except hihat pedal), drums down

They all have their pros and cons, and I don't think they're interchangeable. You use the one that best fits the music. Here's two examples of grooves, comparing the different approaches.

In these two examples, hands up, feet down comes out last. These next three examples shows completely different situations, whit different winners:

So, I think Musescore needs to have three different options for stem direction deafaults, with an easy way to switch between them, rather than having to go into "edit drumset - load" every time. There could be switch buttons included in the drum notation "bar", which has a lot of dead space. Any custom presets you make could also show up here, so that the "edit drumset" button actually just edits (and makes new) drumsets - and does not work like a switch.

Also, you should be able to highlight sections of music and change preset by pushing those same buttons. Then you could A/B them easily to see which one would fit your current situation best.

Hopes this all makes sense, and that someone with skills and knowhow takes the bait... :-)
.mscz of my "presentation" included for anyone interested.