Yot-chan said it well. Your use of Mary Sue does not segue with what old-timers know of Mary Sues.
Also pray tell, if you're as geeky as you think you are, did you never ever think of this when you saw Mari?
Yes, old timers find many reasons to find Mari amusing and likeable.
And, if you didn't know, I'm a massive MASSIVE Asuka fan (*cough*
Asuka's Notebook*cough*). And I love Mari too.