Just watch the video I’ve posted in both of those links. Five minute mark is where to start.
That is of course assuming you haven’t seen it yet. After all, you’ve posted in at least one of those topics after I’ve already explained and broke it down. If they actually try to reverse engineer the Cata maps into working pre-Cata maps with flight, it’s a massive undertaking. If they just straight up port the existing pre-Cata maps into the game, they’ll be no flight, and you know how childish many folks in this playerbase act when they are told they can’t fly.
Either way, it’s really a minimal gain, and in both cases it’s absolutely redundant. As I’ve previously noted in one of those topics:
Don’t get me wrong, I’d love to see Chromie Time expanded upon and able to be used at max level, but at the same time I’d rather them put energy and effort towards stuff that makes far more sense as opposed to a very vocal minority of folks that just seemingly cannot comprehend why they cannot just plop the existing Classic maps back into Retail as they are. This goes way beyond a phasing issue.