I don’t think Kahn has done a bad job, just the opposite, if you truly believe he is the one making the picks.
Jones - he was drafted to play LT. Yes he had limited experience, yes he was a work in progress. Then TOMLIN stuck him at RT. Playing him out of position, just like he has done with other players. Yet the player is always considered the failure. Sure, it is possible that Jones may not work out, but the guy really hasn’t had a true shot at the spot he was drafted for.
Porter - This was a good pick, and I can’t figure why anyone is questioning it. The issue I have is AGAIN, TOMLIN. He has publicly said that he is not responsible for coaching up players, they are expected to know everything already. The current issues with Porter are all coaching issues (grabbing, holding and trash talking).