Gnasher aim or hipfire?

The most important thing is to make sure you take time to line up your shots. I suggest playing in a private lobby and getting a feel for the gnasher (since it has been so drastically altered). Take shots from different distances and recognize the shot pattern
it makes. Also shoot from behind cover and notice where your shot goes. Most of the time you will notice that the direction of your shot is not what you think it is from the camera angle you have in cover. If you can learn the camera angles it will improve
your game dramatically!

Check out this video for examples.

https://www.youtube.com/watch?v=40Xx-v0Iv4Y

A bit of both. Probably more of a sweep shot so kinda right in between aiming and hip fire.

Hipfire.....quicker shots and able to dodge fire more efficiently

If you hipfire, shoot, then aim down sight, it still gives the hipfire effect. Annoying with LMG's.

Oh and while I'm whining, I thought I'd just mention that double meleeing looks like it's going to play a huge part. Killing opponents in this way who attack you with the shotgun, whether it be gnasher vs. gnasher or gnasher vs. lancer (as you can now melee
with it???), looks too easy, effectively making the gnasher a less threatening close quarters weapon. and the fact that you now have a hipfire crosshair with the lancer allows players to run around encouraging spraying, making themselves a harder target, rather
than the before necessary dormant aiming down the sights and becoming vulnerable? Well done devs.