I did see the Matrix 2.0 announcement, though for obvious reasons I can't actually use any of the features listed in it. Obviously, improvements to the basic chat functions of Matrix would be great. For now though, I am stuck with the reality that joining a large federated channel sometimes takes more than 6 hours. I wish I were exaggerating.

edit: I guess though that faster room joins weren't a part of Matrix 2.0. Actually, I don't really have a huge problem with the sync taking too long personally. So maybe Matrix 2.0 wouldn't bring that big of an improvement for me anyway.