In a world where Akuma goes around punching nuclear subs and mountains then fights the cast suppressing his OP powers so he can get a 'fair fight' or where Gouken gets killed but then just re-appears later saying 'I got better', I'm surprised anyone is fussed about Ingrid being a 'mary sue'
That said, she blatantly is, but I feel like that's just because they tried to cram everything about this 'new character' into a single arcade story run leaving it feeling a bit messy and badly written. I feel with a bit more care she could be an interesting character and in spite of all that, how can I not love an ending that involved riding a giant mecha-Buddha into space? XD
As someone with a love of 'meddling' characters I feel she could easily be the 'Loki' of SF if handled correctly and seeing SFV is keen on resculpting or refining characters what better title to do it in? :3
Again though, I doubt she's in the initial 16 but I'd totally play her if she is or comes later as DLC