Now hear me out... this isn't me saying it's overpowered, I'm saying it's breaking the game.
My reason: Me and my Raid mate were goofing about in the Nightfall- him using a Shadowshot hunter and Outbreak Prime.
So what happened?
Well we found out that Vex don't like being inside of Nanite clouds all to well- and they break out into a dead sprint to get away from them. Funny right?
Turns out, they will break into that same dead sprint to get away from Nanites, in a tether. He tethered the Vex and started unloading with Outbreak, and they broke into a full on sprint and got out of the tether when the Nanites spawned and attacked.
Pretty sure that's not supposed to happen. So we tried it on other enemies- Fallen just died so that was a bust. Though Cabal, Taken, and Hive all did the exact same thing- Sprinted out of the Tether and went about like nothing happened when the Nanites spawned to attack them.
I don't think that's supposed to happen Bungie, just saying.
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Another interesting thing is that the Nanite Swarms will penetrate Defender Titan's Bubbles. I found this out the hard way when I was playing Crucible on my Defender and Siva Mites just went right through my Bubble like a group of Sperm.