Keep him, pray to god that Guzman stays healthy and plays well, then trade Guzman and put Jiminez at SS. Seriously, next year is the final year of Guzman's disastrous 4-year contract, there's no way in hell I would sign him again.
Let's not get too carried away with Jimenez. He just started to play well a few weeks ago. I know his D has looked better lately but usually he is horrendous in the field. Guzman is clearly the best option as long as he is healthy.