Like bighoff say's, it is very easy to use. Nothing confusing in the interface at all really. I too played EQ a ton back in the day and this is nowhere near as complicated.
If you don't like using the controller to use your abilities (L2 or R2 + triangle, square, circle or X) you can actually use your keyboard with the game as well and I think the 1 - 8 buttons are used for your abilities.

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