I would not get too attached to the word stroke. I haven't met anyone IRL who talks that way and would shy away from them if they did. It actually paints the speaker in a poor light IMO. The original term was meant, not to describe people who dive differently from DIR, but to describe those individuals who would bulls*t about their abilities to either convince others how good they were or to inflate their own egos. Not the same as simply weighting equipment choices differently. GUE does it's thing but it doesn't mean all other choices are wrong.
The one piece harness is a good system but to be honest, it isn't the be all/end all at the recreational level, but if you are going tech it will become more so. What is more important is to be clean and uncomplicated. I dislike quick releases because they add something to catch on or snag and really don't serve a purpose. But I wouldn't bug any of my buddies for having them at the rec level. Meh.
The number of times I have had to take my rig off underwater: 0
The number of times I have had a buckle fail: 0
I vintage dive and sometimes use a Hawaiian pack, which is basically two metal hoops over the shoulder and a waist strap. No harness from the chest D rings down. Number of times that has fallen off underwater:0