X-Men Fourth Class

I keep going to these big-budget superhero movies, and I keep being disappointed despite coming in with no expectations other than good special effects.

X-Men First Class spent a simply enormous amount of time on the bromance between Professor X and Magneto, contributing to the very low ratio of special effects to "human interest", a phrase I put in quotes because
(a) they're not human, they're mutants and
(b) they're of no conceivable interest.

Niggles:
Mystique is first introduced as a five-year-old who had apparently coincidentally found her way into the Xavier's kitchen. On being surprised by x, she disguises herself as x's mum, who
i) is much larger and taller - where does the extra mass come from?
ii) she's never seen before.

x then apparently adopts her, and they grow up together, which is used as an explanation of why (other than clearly being homosexual) he won't 'date' her when they're both young adults - which brings up the next point. Hank McCoy says that Mystique's genetic code means that she ages more slowly than ordinary people. I can see that that's a necessary save to explain why she looks exactly the same in the later (chronologically) Xmovies, but it does bring up a number of consequent points.

1) If Mystique ages slowly, how old was she in that first scene? Ten? Fifteen? Twenty?
2) If she ages slowly, how come she went from looking five to looking twentyfive in exactly the same time that professor X did?

It can only work if she only begins slow ageing at the moment Hank clocks her. Which is unsatisfactory.

The newly-minted mutants are remarkably lame. The black whore who can fly on dragonfly wings and can cough up fireballs may represent a new low (and it's worth noting that the only black characters in the movie are a poledancer and the first guy to get killed).

I really should learn. But I never do.