The OP is from 2 weeks ago, lol.
It's already been mentioned that the FPs people complain about getting all the time also happen to be the only ones that can pop for low levels (HS, ATHIS, KDY etc). If queue pops and there is a level 15/16 in your group, you're getting HS or KDY.
Also, about 8 times out of 10, those low level players are bad. Like, really bad. The worst noobs I've seen in decades of gaming. So, your run is probably going to suck. And if it's going to suck, I'd rather it be a short FP like HS and not a longer one (with less loot) like KDY.
Now, I don't mind carrying people a bit, most of my characters are maxed out. Although, it's funny when I'm carrying higher levels on my 42 Knight. But, explaining to newbies about LOS or, ya know, their CLASS HEALTH REGEN (seriously?) doesn't do any damn good if they don't read chat. Sorry, guess I needed to vent. I'm done now.