Do share, why don't you use them? And I'd rather have more specific reason than "I don't like them" (which is a valid reason ofcourse), because I'm curious why don't you like them.
Thank you!
EDIT: Typo, and thank you for feedback. :p
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Just not worth it for any serious activity. Generally the risk is not worth the reward in most high level activities. Since you need to leave cover and get in so close, getting killed is pretty likely. If you aren't using a Sniper, Fusion Rifles are just as lethal as Shotguns, but at a longer range. Maybe the huge damage buff in PvE will change this, we will see. I'm using a Shotgun when I go do Patrol lately, because I'm only about 1000 kills away from Grimoire Rank 3 for them, so why not, right?