If the excuse of "it can be scripted" was always used then mIRC would have a GUI like Bitch X and about the same level of user-friendlyness. I'd like to see /names get considered too, it's a good idea.
I'll agree with what codemastr said about this too, if you find fault with someone's suggestion put the script here that you know to work or remain silent, alot of posts here are just wasteful "this sucks" type of comments without any real reason from the posters as to why the idea isn't liked.
In addition, as most will know, scripting is not as fast as mIRC itself, infact nowhere near as fast, if the /names function was built-in to mIRC it would run seamlessly and reliably and not hold things up. mIRC already receives the /names raw info when entering a room so logging it shouldn't be too much hard yakka.