If part of your goal is to reduce setting bloat, then making it even bigger would be detrimental to that goal, wouldn't it?
It didn't prove it's value in the past, which is why it got the axe. In fact, since the new Abeir stuff is going to be a big part of Greenwood's writing, I'd say that the new stuff is probably more "Realmsian" than Maztica was (being a real-world-analogue).
So, if you bought a campaign setting and it explicitly ignored every mention of your favorite place, you wouldn't descend into nerd rage? If something is completely ignored, what is the point of retaining it if you don't intend to use it?