First off, I will use Berserker Vincent as an example and the screenshots below serve as illustration purpose of the normal attack function of him.
I have observed how the AI works while I was auto-ing at Pillar of Exile Floor 30, I have noticed that my Berserker Vincent always hit 2 targets, instead of 4.
I think changes need to be made to the auto function's AI state machine or algorithm so that the AI will pick the most target hit rather than going for 2 by the side. (Hitting diagonally that rips lesser rewards off compared to striking ahead)
The picture on left shows hitting 4 targets on normal attack and on right shows hitting diagonally only hits 2 targets.

The second issue, it is the same as before but except that this lies with the skill activation when auto-ing, where the AI will target 2 rather than 4 if it is an aoe skills. I hope the developers can improve on the condition checks in order for AI to perform better.