We need the ability to right click on players and inspect their gear / character level. Why? Well for me, it helps me feel more competitive. Also, it helps me to learn about different gear and how it looks on characters.
We need the ability to create and invite players into personal guilds. Every other online RPG has this, but this game is missing it. Why? Because its a way to create closer friendships with a group of players instead of just finding PuGs all the time.
The devs have said that they want guilds/clans/whatever to be more than just a glorified chat channel, and while I understand that desire, most players just want it to be a glorified chat channel… Plus there would be some issues with a guild stash, but they aren’t insurmountable (just treat it like the normal AH but you need to be in the guild to access it).
To expand on what he said, last stance I saw from Mike regarding this on his stream (or an interview, can’t recall which now) is that they’re trying to come up with something new and fun for guilds, but if they can’t, then they’ll eventually just release it as a glorified chat channel like other games do.