My Bowling Action

Yes dragging the fron foot back would add an extra bit of pace to your bowling but go easy on it learn the skill and then try it. All over you have a good bowling action pretty straight it is, try not to fall down lol instead of that make a habit of a good follow up that would help alot.
It looks like you are trying a bit too hard. I like your idea of trying to look like as if you are falling, this will definitely distract the batsmen. I tried this variety of times myself.