Mapping it to A/X wasn't the intuitive part - the directional cut/juke moves and directional stiff arms/swats/strip/pass rush moves was the intuitive part - and they don't need to be "pressure sensitive" clearly as various passing trajectories are available based on how long you hold the button. So yes the controller and game interface well enough for you to lob, arch, or bullet passes.
The trigger buttons analog functionality (within Madden) is questionable at best. I would much rather see the left stick be utilized for variable speed up until the point where you want kick into all out sprint - in which case a button or trigger makes no difference.
The larger, more authentic or realistic point of having X/A be "sprint" vs a trigger is that you have to release A/X in order to perform moves that in real life require even the greatest athletes to "do footwork". As it stands now, with the trigger sprint, we are forced to rely on EA/Tiburon programmers to get footwork right - and they rarely do.
Variable speed in Madden is virtually non-existent at this point - you can't really walk around on defense pre-snap and it aggravates the heck out of me. The players seeming have 3 speeds; run, sprint, and stop.
The PS2 layout was simply more intuitive all around and had the built in benefit of forcing users to release sprint for moves that logically require it...