Tags and references
So I see the community has adopted the @ as a way to tag or reply to someone. I think making it oficial like twitter did would be a nice adittion.
Some sort of a diffrent color to the sybmol and the username. Also if you click it you could go to that persons profile.
References would be similer, they would refer to a post not a user and it could use the & symbol. And the same functionalaty "click go to the post". I know you can do the same with links, but if you remeber the name of the post this is deffinetly easier.
These features aren't a necessity, but a fine quality of life improvement.
Hope you like my suggestions,