First one
A fast overview of used Modul slots of a mech. It can be used in the Mechselection on the Main UI page, in the Lobby and in the Mechlab. You don't have to click on each Mech and open the "fast inventory page" (forgotten the button name, sorry ;-) )
It doesn't help for a fast overview, in which Mech you could find a specific Modul, but you can see, which Mech have a Modul (highlighted button) and by clicking on it you can see which Modul is build in:
Because of a prominent position it is easy to use. Master Slot could be golden when active and grey when unskilled (or away).
Second one
Improved Skill overview, seperated by faction and Weapon Type:
Because the actual build presents too much on one page. You have to search a looong list in a small font to find the Modul you are looking for.
Both suggestions doesn't change the complete UI (for example smaller Icons, textbased lists or something else), but help to improve the UI at the actuall build.
Edited by TanE, 24 September 2014 - 02:10 AM.