Yeah KoD's Rush Combo being plus on block is a very pleasant surprise. Not worth mashing after the 3rd hit if you have 1 or more bars, but if you don't have enough bar for super, a cr.B hit-confirm to Rush Combo is actually optimal damage, as silly as that sounds. And even if you have to stop on hit, KoD's plus on hit, too.
I played with Quick Max Bypass with KoD and unless I'm missing something major, he doesn't seem to have a lot of use for it. Here's what I played with:
cr.B, cr.A, qcf+ABC: Won't combo. Since you have to start from a C/D normal, may as well do a normal combo to MAX cancel in that case.
cr.B, cr.A, hcb+ABC: Combos, but the grab ends the combo and you just spent a whole bar on one EX move
cr.B, cr.A, qcb+BCD: Won't combo either. Worthless.
cr.B, cr.A, qcf+BCD: I...actually kinda like this one as a surprise shenanigan, simply cause EX Assault Raptor can't be ducked or blocked, and it's hard to react to from a bypass. I can see occasional, successful use of this trick being made if you think your opponent isn't ready for it.
EDIT: I also just tried cr.A > bypass hcb+ABC to see if I could armor through CD counters. Unfortunately, whether the opponent's timing is frame-perfect or slack, a CD counter will always beat the EX Hurricane. So no O.Yash-style plowing through CD counters via bypass with the King.
EDIT 2: Just realized that while you can't armor stuff with bypass hcb+AC, you have a better, cheaper alternative -- just cancel to hcb+C! The C grab will snatch your opponent reliably no matter what it ticked from (though hop attacks like j.CD/j.D would be ideal). Just make sure you use a cancellable normal (or hop-in with huge blockstun) while trying to bait them!