The standard numerals drive me nuts. They're unwieldy to write. They have too many easily confused glyphs, which seems unreasonable considering they're a recombining set of ten, and a lot of shorthand systems don't touch 'em at all because they're already shorthand.

Not sure what to do except kvetch; this is something I simply haven't found a decent way around, and few seem to share my objections. Even conlangs that try to overdo simplicity rarely see a need to fuck with 'em.