Clunky? I think the controls are superb considering how fast the game is and how much is happening onscreen. They're responsive and you always feel in control even when everything aroudn you is utter chaos (all of the time). The more you play it, the more fun it becomes too as you learn how to be more adventurous with youre abilities instead of just playing it like a conventional cover shooter (which you can).
You'll feel comfortable with the controls and the cover system within 20 minutes but its when you start to mess around with boosting, evading, melee and AR mode (like a focus or bullet time mode) to take down enemies without cover that you really see what the game is all about. It plays just as well as any other current gen third person shooter, except this one's alot faster paced. Aiming is a breeze and executing slides and focus modes and getting in and out of cover all while continuing to shoot becomes second nature and the animation of the suit and the way it transforms and moves as you go looks superb.
The game doesn't do anything new, but it what it does do, it does superbly.