I think the whole light system is at cross-purposes with their goal of making Optimization a thing in Taken King.
I get a little frustrated with everyone describing their loot solely in terms of light, but I totally get why. You can't care about perks when you need to be 311+ for Oryx and you just got a Godroll 302 pair of gloves.
For people to be able to comfortably optimize, loot drops have to be frequent enough to a) see lots of variation in perks/stats and b) have lots of high light so they can infuse what they want, rather than being forced to use the max light gear they have.
But if you turn the drop rate up that high, then everyone who doesn't want to optimize (i'd guess most players) will get their drops so fast that they'll stop playing. And if all loot was 310 in Normal Mode and 320 in Hard Mode, then how many would keep raiding once they got a complete set and thus were at max level? How many people kept their Full STR PoE Gear vs actively checking the stat/perk distributions week to week?
I think Bungie severely underestimated the amount of focus people would put on light. You only need to be 310+ for HM Oryx. PvP Power Enabled differences are neglible. I think they hoped people would bin themselves and say I'm 300-ish, I'm good. I'm 310-ish, I'm good. Instead people are agonizing over 308 vs 309 like it's #Forever29. To be fair, they did anticipate it a bit and thus made the # floating above people's names be level instead of light. But player psychology often chooses painful things, like grinding out Crucible sword hilt kills all in a row.
It should also be said, for everyone chasing 320, this is only a problem until it isn't. Just like people complaining about legendary marks week 1. That may be why Bungie is sitting back for now.
It's a really hard balancing problem. Make it good for me and you spoil the game for non-1%. Make it enough of a grind for the 99% and it's agonizing for 1%. I think at the moment, they've made it too much of grind for everyone. But that's okay if they're nimble and communicative. I'd rather than be conservative about
powerful parts of the economy.
It's a good sign that Bungie is taking a big look at rewards for Challenge mode. And they absolutely need to look at Normal / Hard too, but I wouldn't be surprised if the drop rates don't change significantly.