All weapons that can be aimed, lose that feature but cost 1 less AP, and Rocket launchers CANT BE AIMED.
I personally find fast shot a very decent trait for a crafter, since they will be doing PVE mostly, Fast Shot helps you level up much faster, and it also works quite good with plasma pistols too, although aimed shots are a must for PVP, a very lucky critical on someones hand to cripple it can easily turn the cards in your favor