Turning all dungeon mobs into elite mobs wouldn't help. The good players would still do mass pulls and some of them would expect everyone to do that. If you increase trash difficulty to the point where good players are forced to kill one group at a time, bad players will wipe to the first group.
In HW and SB dungeons have barriers which you can't pass until you've killed all the enemies up to that point. Typically there's two or three groups in each section. Given that you're level 52 you would only have seen the first such dungeon, but more will follow.
On my server it's common to pull only one or occasionally two groups at a time in the Lv 15-49 dungeons. Boss-to-boss pulls are a rare sight. I guess your server's community might be different.