Diewalkure I disagree with you in this instance if you are going by the books. I mean there is plenty of evidence that Gandalf the White and Grey are distinctively different. The chapter the White Rider explains how Gandalf the White could not be hurt by any weapon that Legolas, Gimli, or Aragorn bear (keep in mind Aragorn has the blade that hurt Sauron), Gandalf the White was much more agile (skipping on rocks like an elf), and Gandalf hands also glowed white.
So going from a lore/book standpoint I agree with Dain, however, if we are going with a game standpoint then I agree with you, Diewalkure.
Interestingly, this topic has made me think about Narya and Glamdring being incorporated, I mean with the Arnor faction, Gandalf didn't have Glamdring or any sword for that matter. So must think, if we allow Glamdring the +50% passive damage, should we allow it for Arnor? I don't think so as it should only be added to Gondor Gandalf. Gandalf in Arnor shouldn't have a sword at all.
I agree a lot with what Dain says, he is right. Gandalf deserves just as much application as the chief opponent to Sauron as Galadriel, Sauron, or Saruman. I don't know about all the powers being changed however, but I do feel Gandalf needs Narya and Glamdring, as I have innumerably stated. They are critical to his character and show why he was considered special in leading the forces of man and slaying the balrog.