I personally think that aim assist isn't as much of a problem as people think it is. There's actually several issues for why they're overpowered: 1. The range stat doesn't matter for them, and as of 2.1, it matters even less. 2. They're the only non-heavy weapon that can reliably 1 hit kill someone during a super or someone being revived. 3. If someone shoots at you, you can still counteract the aim deflection and still 1 hit kill them. 4. PvP maps have much more cover in long range areas, so they're harder to use in crucible, but not PvE. Then, PvP-ers complain that people in PvE who say they need nerfs just don't know how to play the game. This means that Bungie can't nerf them without angering PvP-ers. 5. They're the only special weapon that has yet to be nerfed. They were actually been buffed in the 2.1 update. Basically, we're screwed.
I think you have PvP and PvE mixed around. So far it's always been a nerf or buff in crucible that made the PvE people angry. I still think its a bit of a problem though when you're behind a wall and they somehow manage to nab a head shot on you.
It has been that way so far, but Bungie doesn't want to have PvE focused balancing for whatever reason.
They hardly focus on PvE which is both good and bad. On one aspect it means the PvE is running pretty good, not a whole lot of complaining and over all sitting good, etc. The other is bungie forgets weapon nerfs effect PvE as well and it means there's not a whole lot of stuff for PvE. I've notices some posts popping up today talking about making a monthly PvE event like Iron banner. I'll have to check the wishlist to see if bungie plans to do something with that or not