Iron Banner should be a weekly event like Trials. There are quite a few who don’t like the 3v3/survival modes, but still would like to play light level based crucible events. It really wouldn’t hurt anything, but just give an extra option for those who honestly only play IB whenever it rolls around.
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The enthusiasm for IB has actually died down since Trials came out. Even casuals are jumping into Trials, with a higher percentage of people getting Flawless than before. I used to attribute this to account recovs, but since Bungie has been very active in banning people who do that, and hard carries has always been a thing, I can only conclude this to Trials offering more rewards, even without Flawless, and doesn't require ability/super kills that take 20+ matches to complete.