My girlfriend of four years certainly didn't enjoy statements like that. Plenty of women are far larger than Tifa and it's kind of shitty to call their proportions absurd.
Again, I'm not saying she's small, I just think she could've been a tad bigger. But whatever. Barett has a far more unrealistic body type that even fewer men will ever have, but I haven't seen much decrying of him.
Dude, its the video game market, you honestly don't have to look too hard for big breast representation. Big breasts aren't a minority in gaming.