/me still says mIRC should have the non-specific ON LEVEL event.

ON *:LEVEL:#:[the-prefix-here]
ON *:DELEVEL:#:[the-prefix-here]

like,
ON *:LEVEL:#:!:{
.echo -a $nick just got set + $+ $mode (prefix: $pfxmode) on $chan
}

That would echo:
SomeGuy just got set +a (prefix: !) on #TheChannel

I'd also like to see $nick expanded to support "prefix" characters. Meaning, $nick($chan,!) that removes the conflict of mIRC already uses a to mean 'all users'. And also $mode being expanded to support $mode(N,mode). Meaning $mode(1).deop is the same as $mode(1,+o) that way it can work with +a +q or any other levels that servers have.