Hiya Ksikka
You make a great point – in the second example, Alex could be talking about another person. But they're not ambiguous in the same way. The first is misleading to most English-speaking people. If the person speaking says 'they', they are nearly always referring to 'other' rather than 'self'.
I wish I'd gone into the Xe/Xir as well too but the article was getting really long. You know – attention spans. I may revisit it at some point.
Thanks for your comments.
Cheers
Anj :)