Back to the original post - neither technique is wrong or unsafe just subtly different.
The best argument for a constant angle approach is that it requires the student to demonstrate the ability to fly glideslope with lever ie keep the landing point in the same position in the windscreen - this has huge benefits when coming to night/mountain/confined area techniques. He then just controls rate of closure with cyclic.
The other approach manintaining speed is more flexible and probably used more in the real world for an approach to most HLS when power isn't a problem.
I would make sure a student can fly a constant angle approach properly first and then introduce the gate approach/quickstop technique or whatever else you want to call it.
If you approach into wind you have to grossly mishandle an aircraft to get into even incipient VRS so there is no need to be paranoid about it.