Regarding the LF hole--Pillar, despite his ineptness with the bat, has impressed defensively, and has been a major upgrade over Melky Cabrera and Rajai Davis. Remember, Mike Trout had similar problems when he first came up as well with the bat--be patient with Pillar.
If he starts hitting, I would consider him to be an everyday LF next season..Anthony Gose could be considered as well.
Look, we should focus on 2B, a C and pitching.