Suggested users page
I like the idea and probably we'll be able to do something similar allowing user to share some of their lists with others.

We added an option to show 'Featured' posts at the top of your feed
We'll do our best :D

Avoid re-ordering comments after upvote
This happens only when you cast the vote. If you reload the page or force a refresh everything will be ordered as usual.

Allow embedded music in posts
Thanks ;)