Other than reducing stun on the standing jab jab string, I don't see much else. The tools she currently has are more than enough, even without 3k sitdown stun on CH (though it would be nice if she had it, hence why I think the nerfing of the stuns from the jabs would trade off well for this tool).
If any minor changes are to be made, it should be the usefullness of 4k2kpp near the wall. The last hit should register as a wall slam as it did in DOA4, that way Christie will have something to work with against heavyweights.
Additionally, her jab strings from 7p in DOA4 should come back, and her 6h+k (which has been a useless move for the longest time in most situations) should have advantage on block and a decent launch on hit, allowing it to be followed up by p (from BT) as a relauncher. There were more things I tweeted, but since I have issues browsing on an Xbox to look for it on Twitter, this is all I remember.