2 updates:

1. email should be working now, so if you signed up for an account on https://matrix.cybre.space recently and had to leave the email field blank, you should be able to add one to your account now

2. i've done several things to mitigate performance issues on the server (including disabling online/offline status aka presence) and it seems to have stabilized. i'm still keeping a close eye on it so please let me know if you experience issues with messages not sending or long delays