It's always been my opinion that the CoD style gunplay is pretty gamepad friendly. You take the flank, you win. You run into someone head on, the first to shoot wins. I was worried like you, but playing through the PC beta there were fairly few situations where I felt the controls were what led me to lose a shootout.
If you're used to sniping or hunkering down and taking opponents mid-long range I'd guess you're going to find yourself at a disadvantage much often, the parkouring mechanism really promotes movement and taking the flank though, and I think you'll find out this really helps to even the playing field.
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