Crush didn't do any of the code though? Crush made the animations which mesh because of the code. According to other animators, the animations are fairly simple.
Marox does the code for the combatJure is doing the new animationsCrush does gameplay balance
Crush is the person who sets up weapons, determines their stats/damage/timings, and also sets general timings and movement speeds, and when needed makes mechanics ie. miss detector. This is overly simplified as there are group decisions, decisions by Marox, group efforts, etc. but Crush does a ton of the combat stuff and directs the design on the actual swordplay in many regards.