Piratecat
Sesquipedalian
I took the liberty of using the spoiler tag for your post, since not everyone uses the black background. Oh, and thanks!Spoilers below:
Minor Quibble. It's not terribly clear exactly how things happen when the PCs first come to Sayre, a timeline would have been really helpful here (unless I missed one).
Major possibility: What if the players don't destroy the bitter glass? It's a powerful communication tool that they can take offline at will. If I was a PC I wouldn't be inclined to smash such a powerful tool.
[sblock=My responses
![Devious :] :]](http://www.enworld.org/forum/images/smilies/devious.png)
Possibility 2: It should specify (and I'll have to make sure that this is in there as well!) that it would take months for an accomplished arcanist to learn how to attune panes and to learn the stabilizing ritual -- and meanwhile, the githyanki are still using it. Either way, it's not a bad thing for the allies to have that as a tool if they decide not to destroy it. There are interesting consequences either way.[/sblock]