@HelloProject FWIW, I don't disagree with your general point that MUSH UX can be improved. What I'm having trouble with is how you think it should be improved.
You've mentioned macros - okay, @Thenomain says his code has them, Ares has them. I don't think anyone disagrees about macros being useful.
You've mentioned simplifying rolls with abstracting commands - okay, but various people have explained why that's a conscious design choice in all the examples you've cited. Either for situational flexibility (i.e. not having to code up everything under the sun) or for copyright reasons (not being able to completely replace the rulebooks).
You've mentioned systems being different on different games (like +myjobs) but, well, frankly that's just never going to change. With the MU community fragmented as it is, you can't expect every game to have the same command set.
You've mentioned "complicated syntax" but the examples cited (rolls, mail) you don't seem to have a problem with specifically. So... I'm just really not sure what you're talking about there.
We've talked about softcode/hardcode commands and prefixes, but until you replace the old platforms, there's nothing to be done about that.
What's left?