How about a key mapping to instantly squelch whoever happens to be transmitting on range? IE, see a particular name displayed on the screen, stab a button, presto, no more on range.
If we're never going to get a permasquelch list, at least simplifying the squelch process would be great. Trying to type .squelch Cr34t1v3lym1sp3ll3edg4m31D in the middle of a fight is a PITA.
Anyhow, shutting people up with a single button press would be great.