My guess would be some combination of laziness & server load issues/draw distance. It really is baffling that Mobility doesn't affect Sprint Speed, I mean it would only make sense right? But Bungie and logic just don't mix these days, otherwise they wouldn't have gutted literally 3 years of improvements and maybe, just maybe, might have taken a few hints from their competition (especially Diablo 3) on how to make a good looter. But I mean, look at how crappy Armor still is as well - it does practically nothing in terms of HP/defense, which is straight BS. This is something that's quite frankly pissed me off since the launch of D1, how those 3 attributes really don't do a whole lot other than Recovery, which itself is kind of wonky as well (personally I'd love it if it affected your regen delay over speed or at least be given an option on which to boost with it). It all just comes back to how shallow of an RPG experience Destiny is and always has been. As a shooter it's mostly OK, balance issues aside - but as a looter/RPG? Abysmal failure. Don't even try to argue that point, because there are too many other games out there that set much higher standards with again, D3 really being at the top it's seriously crazy the amount of stuff you can tweak in that game. Warframe probably comes in at a close 2nd and then it's a tossup between The Division and Borderlands as both have a different take on things and have aspects I take issue with (though I absolutely adore Massive for introducing a way to directly increase an item's strength so you're not forced anymore to hunt for a higher roll of an already perfect item, you can just use Division Tech to raise its stats now.) At least D1 attempted to give us some semblance of a proper skill tree, these preset paths in D2 are a slap in the face. I'm pretty sure even a 5th grader would find it too simple/boring.