I hope you watch more than one tanda when it comes to follower's leaning.
I also don't know what you mean by waiting for your heel strike to transfer your weight. I don't transfer weight based on the leader's feet; I transfer when led to transfer by the movement of his body.
This actually brings up an interesting point. Lead think verses follow feel. For example, if I am leading a turn, I do not think "rotate my embrace counter-clockwise" or any such thing. Instead, I might think "maintain the embrace and execute a smooth, controlled, lapiz." No, the follow will not cue off my lapiz, but, hopefully, if I do this right, she feels my chest and embrace rotate. For me, this is true for many other tango movements. As a lead, I may think in terms of steps, or body position, or whatever. Indeed, that is of no concern to the follow. Her/his only concern is how the embrace feels and where it is going. With enough experience, my "lead-think" translates into smooth, comfortable movement of my embrace, and hence into "follow feel".
Thus, and I apologize for any misapprehension, when I spoke of "heel strike", that was my "lead-think" for weight transfer in a simple tango walk.