If I remember correctly, his BA for 93+mph fastball was .095 last year + his K% was really high. I also heard he's a really bad defender, and most likely, he'll be a DH. For 2yr, $34m, that's cheap and short enough to gamble.
He could either take that kind of contract, or go back to Japan.
I wonder how Okamoto's contract will be. He's supposed to hit fastballs way better, much lower K rate, but less power than Murakami. Also, a better defender. So, Okamoto is a safer bet. Maybe, 3yr, $15m AAV?