Being able to display information onscreen would be useful, particularly timers.

[Timorio]

This would help keep track of bandage timers, potion durations, cooldowns, etc. HeadMsg can be used to an extent, but leads to clutter, especially on a server like UOF that already uses native head messages for explosion-potion countdowns.

This video has an example from Orion:
https://youtu.be/07I4MC44lQk?t=99