I don't want to turn this thread into a CFS standardisation seminar but....
The skill that is taught in Desc 2 is that of co-ordinating left and right hands to establish a constant descent path. That descent path may not be the correct one for the approach to a runway and, therefore, the 'approach' is not pertinent at this stage. However, having taught the essential skill, it is perfectly acceptable, nay important, to teach the next step - achieving a specific descent path (that appropriate to a runway approach)- on return to the airfield.
It is the failure of instructors to teach that very important final step which results in so many poorly controlled approaches and, consequently, poorly executed landings.
The other clear difference between our understandings is that, in my day (voice goes wavery and walking stick is waved), pilots of both Chipmunks and Bulldogs did not use point & power on the approach. The relative merits of the two approach techniques is, however, another matter and definitely not one for this thread.