I don't know if anyone has suggested this before but:
My idea is that someone makes an add on. That add on will be able to shift bricks around in the actual brick menu. Not the cart. So the add on will be server sided. how ever the host makes the bricks organised will be how they display for everyone else. I don't know if thats possible but if it is that would be awesome. If it isn't. Then maybe you can make it client sided? were instead of the host, each player can organize bricks and drag them around the brick menu for there liking.
This would make having a ton of bricks a lot easier.
Heres the summary:
*Idea 1: server sided, host can move bricks around to his liking for everyone to enjoy.
*Idea 2: Client sided, every person on the server can make the brick menu how they want it to be.
Not clear enough?
Ask questions and ill try and answer them as best i can. This has been something that i think will be incredibly useful
Edit: I don't want just /support, i want to hear your ideas and if this is possible. If you say that you support and don't do anything about it. Then what is the point? If you like it say you agree with me. But give ideas of your own