I can see Fitz at some point becoming a Holy Knight, but sorry but I agree to me it just doesn't fit as a wolf. I cannot see a child of Tara West, raised with her values in the woods of the Pacific Northwest, falling into the gutter to be pushed around as he was by a second rate sorcerer. So as much as his description fits some things most of the stuff just doesn't fit.
I think it fits perfectly as a wolf, honestly.
Fitz, born of Tera, as a wolf pup....weaned and then left to his own devices...he changes to human, and forgets/doesn't know he can change into a wolf, and gets found by humans.
I think the issue here that people are forgetting is that Tera is a
wolf...she wouldn't necessarily raise a child with 'values'...that's a human thing, not a wolf thing. Remember, she was into MacFinn mostly because he turned into the biggest, baddest wolf around..not cause he was a nice guy who was kind to children and old people!
Fitz does exhibit some 'wolfy' characteristics, to me. Then again, they are very similar to a lot of Harry's traits, so they might be 'orphan' traits, rather than wolf ones.
Fitz, as a child of Tera and MacFinn, sounds plausible....but, I think we should probably also consider that he's a minor ectomantic talent, who's parents are dead.