[Tyhm]

1) Normal movement / hit detection won't work anymore. Or at least, you can't trust it for things like arrows on a gmap, etc. - in which case you can't really use it. (I suppose a True Minimalist would claim you could just script a system to hitplayer based off the direction of the projectile...)
2) Inevitability. In a perfect world they'd make a Classic that was a straight translation before Improving it, but LATers are inheritly impatient - that's why we edit the levels in the first place - so we tend to Improve and Innovate before it even gets posted.
3) What Globals?
4) That's a request, not a question. The answer to the question is of course, the answer to the request might be No you may not.