I'm a big fan of Spelljammer and have no recollection of seeing Abeir in any SJ source. As far as I know, the only information about it comes from the 4e FRCG. I think there is someone, somewhere, making a world out of the bits of Toril that got "lost" and filling in the details with Abeir-like stuff. But I can't recall exactly where they were.
I'm with Ascension and Steel General over the cloud layer. If you wrapped this into a sphere (sans your top and bottom boarders) and gave it to Silverblade's Suitcase for inclusing in a 3D space picture, the cloud layer would be great. But as it is, it just gets in the way of surface details.
That aside, I think this is one of the most attractive maps of Toril I've ever seen. But you might want to check your sources on Osse, as I've seen other maps that have gigantic lines (like the Nasca Lines). I believe the lines are supposed to be big enough to be visible from space.
So far I've not found anyone who knows why the lines are there, but they generate interest in the Spelljammer community.