I have never had an issue with Holt, or with the Sox tendering him a contract this year. My belief is still that he brings value to the team just in his ability to play several positions, even though he doesn't play any of them very well. I give him a pass for last year, due to the concussion.
I was and still am hoping that he will return to a player closer to his previous levels. He hasn't looked good yet, but it's a very small sample.
All that said, I like what Lin brings to the team with his defense and speed. His bat has been better than Holt's. So, I would also keep Lin and send Holt to AAA.