If it works for S and L and the climb, why not for the approach?
I have shown it to students who have been passed to me mid course and they have been stunned how much easier it all becomes.
WR all I advocate is looking outside not ignoring the ASI altogether. What worries me is a fixation with instruments when flying VFR. Of course use the ASI but not to the exclusion of all else
Sorry to bring it up again WR but if they peg the airspeed they will have by default flown an attitude accurately, why not just fly the attitude?