My name is Dread and I would happily support this effort were Blizzard to think of doing such things. I feel horrible in an endgame surrounded by people who's new gear allows them in, but their lack of skill, spatial awareness and general dedication to a cause causes others who put in work to get discouraged. I think re-introducing surprise and random effects as well as many of the mechanics mentioned in the OP would help weed out. I'm not saying don't let the wannabe's in, but maybe separate the content further than normal and hard mode. Maybe make the hard modes harder, and in turn add a bunny mode under normal which requires minimal movement or GTFOOF moments.
"There are no men like me...only me."