Are we ever given a real reason why she has power on par with Diana?
Actual reason: Doselle Young missed the whole post-Crisis power-down of non-Diana amazons. My fanwank: Diana got a gift from the gods when she won the tournament, in the form of a magic weapon. Perhaps Nu'bia's gift was the power of flight (and, potentially, the rest of the flying brick set) - either inherent, or as a property of, say, her armor.
the way Donna keeps getting referred to as not raised on Themyscira is troublesome
I would really, really like just a two-page backup in an issue of Wonder Woman that tells us what the fuck continuity looks like post-ICk/FC, and my three major questions would be 1) why and how the hell is she a Princess again, 2) did the Medousa fight and Athena's ascendancy still happen, are Hades and/or Hermes alive, and why the crap are Diana's eyes blue again, and 3) what in the seven mounting heavens is Donna's deal right now, because there are at least three mutually contradictory takes that have all been presented as fact in three different places post-ICk.
Much as I'm enjoying the whole gargarean thing, I don't think I'd have used the Olympians so extensively while the embargo on the Rucka gods lasts. Because it can only provoke questions that can't be answered - the absence of Ares and Hermes thus far is fairly glaring, but both of their status quos were changed so dramatically by Rucka's arc, in ways that can't (unlike Athena's fall in status) be dealt with by simple amnesia, that if they showed up in their pre-Rucka forms it would be just as glaring.