If y'all want to duplicate this in ZScript anyway then what's the point? We'd just expend multiple resources to do the same thing that are incompatible with each other and still have to be maintained separately. Okay fine; now it's my turn to ask:
How long is this going to take to complete and how many people are going to work on it?
A year? No way. The whole rationale of switching to AS is that it's fast. If this takes a year then I'm out right now. Period.