Supervive social systems are pretty bare bones currently and I do believe they could add a lot more to it. I'm aware that it's not going to be their priority for a while but I just want to shoot some ideas.
Clans - It'd be cool if you could have a dedicated clan system similar to marvel rivals where you could team up with people in some sort of tournament for a prize. This could be similar to how clash works in league of legends.
Emotes in chat - With how much TC loves their emotes I find it a bit hard to believe we can't use them in chat. Like I love the
emote but I can't use it in game. Please add it TC 
Dms Stay Logged - It'd be nice if DMs would stay logged for a few days. It doesn't have to be long but if it reset every week it'd be nice
Dedicated Mastery Button - I don't know why it's a emote since mastery varies with different hunters. There should be a dedicated button to flash your mastery that matches your hunter. Another thing is for the mastery to get some animations or visual update cause they look a bit sad. Bonus points if the mastery icons match the theme of the hunter and gets cooler as it ranks up.
Last online - Basically being able to see when somebody was last online
Allow callsigns to show up on your friends list - What I said before
Add different status - Such as Online, Away, Invisible, Do not disturb