yes they can
no they cant
I would much rather have the system the way it works right now, when everyone is on even play field.
The fact that your raid could theoretically end up with 25 items from one LFR boss with the current system makes a pass option rather useless unless it actually gives another person two rolls.
I have yet to see a single suggestion of changing LFR loot system to have a smaller chance of gearing up.
Every single thread can be summarized in :"Moar Loot!!".
This one,as an example,you would eventually get loot that another person passed on.
This premise is the problem in most of these kind of threads: Blizzard has stated that this system offers a gear up rate equivalent of the normal raiding system and they are ok with this so any kind of suggestion for a better LFR loot system should focus on that "Better" not "More" or Blizzard will just ignore it because theres a finite number of carrots.