I agree that the screen is pretty rough, but it goes with what I'm looking for in my UI. More information onscreen about my team.
From a newbie aspect making the UI less intrusive is good, but from a more advanced player I want to be able to see as much information without having to go back to the citadel to look at it.
I think everyone agrees though that we should have a team member icon area so that we can see our teammate's health, mana, and status. With a team-based game this is important to coordinate correctly and it is hard to do if you can't see how much health/mana a person has.
The citadel info area was supposed to be a collapsable area that you could click on the title bar to expand or collapse it into a quick teleport icon.
I think the biggest issue is that you are unable to quickly tp back to the base you have to scroll all the way back to select these buildings. This interface would not let you purchase upgrades/items, but it would allow you to look at the tree and items ahead of time so you can better plan your trips back to the citadel area.
At the very least I'd like to see these as interface "options" so that you can turn it on or off if desired.