I have a question.

I've been skimming through the story and not really taking in any of the finer details, so if this is totally off the table for reasons we've already been told please correct me. But is there a possibility that the "key" and its powers of interdimensional fusion (I think it's called?) was potentially Azem's answer to the problem of the Final Days and the Sundering? We know they disappeared and that they "sought to defy fate in their own way," and I find it interesting that it's termed "dimensional fusion" when it's being referred to as an object that supposedly enables travel, particularly since fusing dimensions is surely the reversal of creating and dispersing dimensions, or shards, as the Sundering did? It seems to me more that the existing Alexandria fused itself with the Source, particularly considering the remnants of the old city still remain, or am I misreading another pluck and drop as with the Crystal Tower? Environs seem much harder to "travel" through dimensions than a single building, though, and the way we have parts of Yyasulani with parts of the Ninth feels again more like a "fusion" to me, but like I said I haven't been keeping up with the current lore and theories at all and could be way off base, lol.