1. Plenty of monsters take priority in dungeons, many require interrupts and dodging, are you asking for more 1 hit KO skills? Just because a pull is wall to wall doesn't mean me as the tank is not focusing and stunning/silencing stuff. Also Branching dungeons have never really been a thing? Even Haukke manor they are just rooms on the main path.
2. God no plz, the trash and 10min run times between bosses is why I never raid in WoW\
3. No thank you, if you want extra challenging you can do at min ilvl and do Ultimate fights. This just seems pointless.
4. This is very WoW mentality and part of the reason its community is running away, simplistic gearing is nice, it lets them focus on encounters not worrying if BLM A has "BIS LEET GEARZOR" having gearing disparities breeds toxicity.