I am not sure. Maybe League of Legends made me change my view on certain things, but this will make Duty Finder parties even worse. The analogy to LoL is that people play Botgames until Level 50 (you need to be Level 3 to join PvP) and when they do, they are ridiculously unskilled because they played against the low-AI and think they know it all and make you lose because of that.
I mean, you have those instances which are only for you, but two quests further, you have the dungeons with a hard iLevel requirement where these players get stuck then. What is this logic? That is like driving automatic transmission on your own and think you are uber skilled and suddenly your party puts you on the driver's seat of a manual transmition. Oh, the stutters and stalled engines...!
My worst instance so far in that matter was the final fight with X'rhun. I retried four times, buying new equipment meanwhile. Winning this instance was a blast after I figured out what my mentor cat did (and what I failed at). A quasi-cheat is so underwhelming, innit?