I'd like to see all of the "utility"/"hybrid"/"cheap chili on an artificially cased hotdog in an attempt to make something tasty"/etc. jobs gain more damage or more of a purpose than they currently have, Blue Mage included.

Being better at farming level 75 content, which almost any job can do exceptionally well in a duo environment, doesn't do much to alleviate out-and-out terrible performance against anything of level 120 or above. The most extreme comparison would be Salvage VS Legion, an event where the only reward for better performance is being done a half-hour early VS an event where poor performance from the Melee Bros produces a straight-up failure to kill the things you wanted to kill.

Blue Mage is definitely the most well-made job amongst the huge, goofy "something (probably one-handed melee) and something else (meant to add utility)" group of jobs, but I'd say that whole strata generally gets the short end of the stick. There's plenty of room for the damage dealt by Blue Mage, Thief, Dancer, etc. against high level monsters to increase without encroaching on the position of Warrior or Dark Knight or...Warrior or Dark Knight, I guess.