I don't understand why...
I love Sarah (she's my main) and I also like using Pai as well. Jacky is a work in progress for me, and while I never use Akira, I actually love the more involved handling of these characters. I haven't played a VF game in so long, and even then all I did was play the demo at a store a few times, so it's not like it's because I'm a fan of VF, since I don't play the games.
But I honestly don't see the need for so much hate on these characters in DOA. It's already disheartening to hear so much dislike for Sarah (I get this a lot personally), but for the entire cast it just seems unnecessary. I mean you don't have to use them, and I don't often see people using these 4 very much online anyways, so why...?