Just a thought.
Clearly people are playing Iron Banner to get a high drop rate since most are 300+ at this point and it's one of a few sources to get 300, 310, or 315+ gear from a crucible orientation standpoint.
How about you just make difficult bounties. One weekly, five dailies. The five dailies? If you do all five for 5/7 days of competing will net you a 3XX light drop of your choice when you turn it in to Shaxx or you can just make a weekly last that long (complete 25 bounties) and let people rack it up over multiple tournaments.
This RNG system of giving the worst players good drops and vice versa is not working for me either... what do you all think?