I personally like Tifa, I didn't really find her outfit out of the realm of imagination or character-breaking, considering her 2nd job was a barkeeper and it's generally acknowledged that service workers are often also meant to be titillating (how you feel about *that* is another matter). I also like Bayonetta. Even Camilla from Fire Emblem Fates is quite popular although personally I wish she'd put on pants as I'm sure riding a dragon in panties is very uncomfortable. I think there's very few people here who are completely against sexy women who are sexually forward but the question people are asking is this:
Is the sexiness essential to the character or is the costume pointless to communicating the character's personality?
I feel like being attractive is a staple of video games, as people have a hard time finding ugly people "cool". However, most women are saddled with outfits that are impractical or compromising with little reason to exist. Let's take the upcoming Star Ocean 5 for example.
[spoiler=Embarrassing outfit ahoy!]
The game isn't out yet, but what about this outfit is going to be essential to her character? What would be lost by filling in all the diamond cutouts? Or even half of them and just leave them open in key places? How does this stay on? I realize Star Ocean always has a token sexy mage and at least this isn't AS bad as Meracle from SO4 (which makes me feel like I'm going to go to jail for looking at her), but the game has gone from "plausible sexy" to "How is this even an outfit" ever since Star Ocean 3. SO4 also happens to have taken a huge decline in quality from SO3 so I feel like the over the top sexiness of the outfits is being used as a crutch. Meh, currently Star Ocean is an easy target for "bad RPG with bad characters".
More relatably, in Fire Emblem you can just point at Nowi and all the knights. People just don't like Nowi's outfit and it has nothing to do with her character which leads to people crying about sexualized children. Sully and female great knights and generals being pantsless also rubs people the wrong way. It doesn't add to anyone's character, it's just bad design for characters who are supposed to be taken seriously in combat yet wore their shortest booty shorts to battle.