The thing is, on the other melee jobs your ranged move is almost never used... so monk lacking one doesn't seem like a glaring flaw in its toolkit. I don't think monk needs one just because the other three jobs have it. Going between playing monk, ninja, and dragoon, I tend to forget that two of them even have a ranged skill and don't miss its absence when playing on the third.

That said, if they do want to give monk a ranged skill, bringing back howling fist to fill that role could work. Or they could also use something like razor gale from FFVI.