Allowing a separate Move action is a massive change. It is not "a little" change. It has a huge effect on tactics and capabilities. The barbarian PC in my group ALWAYS moves or shifts and THEN charges once he has position. The Move prior to the charge is a critical capability. Prior to 4E, for example, unless you had quick draw you couldn't charge on the first round of combat (assuming you don't carry your weapon out). Even more importantly, you couldn't charge unless you had a straight line of attack, and other things kept you from charging.
All of this does affect the discussion on allowing you to take actions after a charge. With the huge versatility and thus power increase on charging, IMO something else needed to be done (other than the drop of attack bonus to -2). I would've liked to see that charging grants CA to all opponents except the one(s) you charge.