This isn't a new concept by any means, but I thought I'd share my new personal favorite wall combo ender.
After any combo where you've already used your hard stun (namely AA BE), I use 4B B after the second wall hit.
Normally the "soft stun" from wall hits causes 4B B and 66B B to hard stun the opponent, granting a follow up attack.
If the hard stun is already used, these attacks combo, but leave the opponent standing up. 66B B pushes Leixia out, but 4B B leaves her at +4, directly adjacent to her opponent, who will still be very close to the wall, in a VERY uncomfortable situation.
Using 4B B doesn't grant as many + frames as 4A or iWR K, but it does excellent damage, and has mixup potential with 4B bK if you're feeling brave. Regardless of whether you choose 4B B or 4B bK, most opponents will lock up, giving Leixia an easy throw opportunity (B+G, W!, 1B does 63 dmg here and gives another mixup).
If they block the bK pound, she gets AA for free (18 damage, +2 advantage), or you can go for another guard breaking move to really work the gauge.
Personally, I like to use 4B (no follow up), CH AAB after they block the bK, as most good players will be thinking, "He's gonna do it again, so I should step now").
6B+K is a really safe option here as well, as it does good guard damage, is 100% uninterruptible (i17 at a +10 advantage), forces crouch on block, and often catches step with its tracking.
I routinely demolish people with this tactic after a guard break. Here's a sample "string" to give you ideas.
iWR K, Break!, 44[A], AA BE, 3B, W!, 4A+B, W!, 4B bK, AA, B+G, W!, 1B, WR A+B, 6K K, 66B, 66A A, 2K.