The helipad Cat A was around in the mid/late 70s and became part of British Airways procedures offshore on the Brent platforms with their large unobstructed decks (Brent B in particular). The diagram in the OP is not very representative as most profiles are far more vertical than is shown: the criteria is to keep the helipad visual through the chin window, not out of the front screen! We dabbled with the idea in BEAS 212s, but with rig shuttles and 5 minute turnarounds it wasn't deemed practical plus many of our into wind profiles didn't allow a back up.
The BA S61 drivers (when introduced to the procedure about 1977 or 78) actually started using it off the runway at Sumburgh, which seemed a strange thing to do with thousands of feet of reject area ahead on departure.
I've found the biggest challenge to be getting pilots to understand the overall concept along with judging the TDP properly. Once that hurdle is overcome then there is no real issue in carrying out the procedure.