Irelia does not need 600 range on her Q
It's a resetting dash that is among the fastest in the game. On top of that she has E and ult to help her gapclose. Despite all of that her gapcloser has more range than the AAs of almost every ranged champion in the game. Even CertainlyT had enough sense to make Yasuo's E somewhat slow for a dash, give it less range (475) than most ranged champions, and make his only other gap closing tool more difficult to actually hit. Meanwhile Irelia gets such an incredibly strong gap closing tool when she already has two other abilities that enable her to literally just walk up to her goddamn target on hit if she wanted to.