Reload Dizzy wasn't the same as AC Dizzy. Her fish summon wasn't nearly as strong in Reload. The thing that made fish summons so strong in AC was the follow up summon. Even with YRC, single summons shouldn't be as strong as AC summons. Plus if you're using all of your meter for YRC's, Dizzy's defensive options will be very limited. A lot of her damage in Reload came from 236HS FRC during combos, so that's gone in Xrd or it will cost you twice as much meter.
Edit: I can imagine Fish YRC working a lot like Bedman's DV Task YRC. It should give you good options, but it doesn't seem broken.
Edit: I can imagine Fish YRC working a lot like Bedman's DV Task YRC. It should give you good options, but it doesn't seem broken.