Exact Mana/Stamina Pool.
 

Since I see that alot of UI things like the map and compass have been removed, might as well post 1 more.

The UI never showed mana pool or exact stamina on live initially. I don't know when the UI started showing it, but it wasn't before I quit playing. The UI only had Hit Points. Determining whether you had at least 100 mana to cast that 100 mana cost spell was purely a guessing game.

If you use the Velious User Interface skin available in the OP of the Getting Started thread ( http://www.project1999.org/forums/showthread.php?t=2651 ), which I do, your interface will not display the numbers for the mana or stamina pools. Also, your chat windows will be all nice and transparent, making it way easier to interact with the world!