Useless, because you could just use another Accuracy earring and be off better. At worst, could use... Steelflash/Heartseeker, since you have them on you anyway. I guess.
Well... with that in mind, it's better to replace Maxixi Tiara +1 with Step Accuracy +15 but no regular acc at all by something like Maxixi Tiara +1 with 25 Acc or Taeon Chapeau with 10 Native + up to 25 Augmentable Accuracy, right?
Right. I pretty much just use my max accuracy gear (which probably isn't the absolute max, because I'm too cheap for a set of 10 DEX, 25 Accuracy Taeon) for Steps.