if their gonna have good battle music i say it needs to expand farther then 1 kind of music for all mobs, and i know many of you will prob agree with me when i say this but
i think MMORPGs need several kinds of battle music for all types of mobs, not just different species, but im talking about one type for normal mobs, another for quest-type mobs, another set for boss mobs (for the major dungeons), unique mob music, rare mob music, ect.
i dunno if many of you will actually agree with me but i at least think that its needed so you dont get bored with 1 music, and yes i also think that every other update or so, more battle music should be added or even replaced (up to a point) so that way it isnt just listening to the same thing over and over till you go play another MMORPG cause your already one of the top players