I found out how to remove that gamepad image from the UI :
type /controller and uncheck show controller in ui
It isnt in the options or anywhere, you need to type in that command, pretty silly if you ask me... more annoying is that the controller options only show up if you select the gamepad as your controller, which lets you turn the image off, but if you select mouse and keyboard it shows the gamepad image but doesnt give you the option to hide it unless you type /controller.
Seriously wtf logic is that ?
I am still in the training island, got to level 11 and finding out nice things about the ui all the time, like the way it highlights needed mobs on the radar if you click the highlighted mob name in the quest description.
Some things are pretty clunky, like needing to alt then right click to use the extra quickslots which I got on the side. The combo system is also a bit off as occasionally it is slow to bring up the spacebar to combo option and you end up hopping in the air in front of an enemy and get slapped.
... still as a free to play title it has its charms, and time can suddenly vanish... like hey I'll play a quick hour of Tera at 7pm ... and suddenly why is it 11pm