Going off your Takedown run for MW2R, it seems mostly fine. As far as smoother goes, perhaps lowering your sensitivity would help. For MWR/MW2R, I play on 3 for both horizontal/vertical. The main issues I saw were that:

• You don't turn enough when you strafe. Most of the speed you get comes from turning, but you don't want to turn too much, you still need to maintain good lines
• A lot of the time you don't sprint enough to get enough speed from turning on the ground

If you try a lower sens and spend a little more time on the ground before jumping each time, you should be able to turn more/get more speed out of it