1) Maybe as a backup
2) Possibly. But only as a platoon guy against right handed pitchers.
3) Most likely. And worse than that, he's solely a platoon guy against RHP. He has proven he can't hit lefties.
4) Does he have any value right now?
5) No. At this point we know what he is. A left handed power hitting high OBP guy against right handed hitters. A backup player positionally that should fill in for 80 games or so a year giving the regular 1B, C, or DH a day off.