The 4:6 match-ups are based on Kalas's experience in high level play though. Leixia's generally low damage output is the key reason we see her being weak in this game. CH damage and BE / CE damage for some (if not most) characters is so high that having low damage in this game is a serious, serious problem.
Consider Siegfried. Many people (myself included) considered him to be very weak when this game first emerged. On paper, his tools are either relatively weak, or massively unsafe. He seemed too risky to use. But because of his CH damage, and NH damage when buffed with meter, he can obliterate his opponent with a few good reads, like we saw Omega do in the world finals, or like two of the top Japanese players have been doing since the game came out.
Leixia on the other hand has some of the best tools in the game in theory. She has amazing evasion, super safety, and a nice mix of feints and anti-steps. But the problem is, none of them do any damage. It might be difficult to hit Leixia, but once you do, you make up for all the time she's been tickling you to death with her feather duster.
My point is that, imo, the game has changed. We are used to speed and safety and +frames being of super importance in SC, but for the moment I feel that in this game, they're not. It's much more about playing the odds and looking to get that big combo and knockdown oki wherever possible. Leixia's problem is that she doesn't have that big combo. Her 3B gives her 41 damage. So she's playing a cutesy, tappy-tappy game where the other characters are engaged in a slugfest.
Her problems imo were mitigated pre-patch by WR B BE. Sure her mix-ups were weak and her damage poor, but the great thing was, Leixia was as dangerous after being knocked down as she was standing up. WR B BE used to be completely invincible to Vertical attacks from frame 1, meaning that once you knocked Leixia down, you had to use low sweeps or throws. In other words, pressuring her with oki was much more difficult, because WR B BE was like a super-Crybaby.
But it doesn't work like that any more. You can't use it randomly from the ground, you'll just get hit, and the damage was nerfed too. And now that 22K knockdown is gone, FC 3B damage is small, and WR B BE invincibility is gone, she really doesn't have anything for her opponent to fear. So her opponents can play high risk all day long going for the big damage, knowing that any mistakes (even bad mistakes) won't go heavily punished, unlike against the rest of the cast.
