Loving it so far Water Blower!! 

the ability to choose relay is really cool. 
the search function is looking pretty awesome so far, just a few graphical ui/ux touches maybe.
when highlighting over the icons on the left it would be cool to have a hover explaining what you're potentially clicking on
Adding different themes so everyone can customize their own page client side with different colors or very simple code like the matrix rain or a bash shell flashing.
was thinking it would be cool if I could write @Wate and your name would come up and i could complete it with tab?
Private group chat would be exceptional. - within group chats it would be excellent to have a  voice chat function akin to discord or perhaps impervious and their P2P functionality. 
communities that can be created or are pre-made among trending topics/subjects so discussion can hopefully be healthy and in one spot
maybe the ability to add emoji responses (nostr ones of course) to peoples sentences?
perhaps the function to /gif or /tenor to bring up easy gifs for more memeing (option to be turned off per channel basis of course too)
screen sharing in time.
integration with private channels/groups on 0xchat (? no idea how feasible this is or if it's even likely to happen)

Lots more im sure in my head but need to eat 😂🙏 - Thanks again Water Blower - This is great!