No, oh god no.
Shame on your, turtle, for suggesting ways how mIRC (and, in places, how IRC) can become more IM-like
mIRC and IRC are fine as they are without frilly, multi-coloured, day-glo fonts (what's the point?) and an abundance of animated emoticons plus god knows what else.
I hate IM's for the above reasons, along with the fact that if you're in more than 3 conversations, you can kiss your desktop space goodbye.
No, IRC doesnt need to made more IM like and nor does mIRC. As the expression goes: "If it ain't broke, don't fix it"