Last year he was able -for the first time ever - to his lefties and righties equally well. Give him a full season and he'll hit .310 with 40 homers and 115 rbis.
So....You have Chavez improving .33 points on his 7 YEAR CAREER AVG. And giving him 6 more HR than his BEST year ever (assuming he can play more than 153 games, which he did that year), and would also top his career high in RBI.
I've rarely seen a veteran of that many years show that drastic an average shift and I don't see how he will improve in every category with next to no protection in the awful lineup that he hits in.