Citation needed for ALL of that.
Regardless:
"We don't have enough dungeons" should be answered with more dungeons, not the removal of other features.
"We don't have enough Legendaries" should be answered with more and better Legendaries, not scrapping of the entire system.
"Tier bonuses suck" means people want better, more balanced tier bonuses that make sense, not complete replacement of tier bonuses with a WORSE system that requires you to re-grind your set every time you get a new piece of gear.
"There is no world content to do" is still a problem. Adding more instanced content doesn't address that at all!
Nothing you've just said makes any sense. You're basically just white-knighting blizzard at this point.