Well Duda slumped the last two weeks or so, which wouldn't be so bad if someone else picked him up, or hell, maybe he wouldn't be slumping so hard in a better lineup (pressing, not getting as good pitches to hit, etc). I agree that the .777 he's slumped down to is probably too low for his defense, but if he can get back above .800 I think it works out nicely. Obviously you don't want him/that to be the best outfielder of the 42 the Mets have, but it should be a pretty solid contribution. He's clearly very bad at defense, but I think the defensive metrics might be overstating it just a tick. Last year I didn't think he was getting any better out there and was worried, but this year it does seem like he's grown a little.. One specific I've noticed is that he seems to be over-committing less than he was early on, but maybe that's just a sample size issue too. He seems to have a poor sense of when he can get to the ball with a dive, and a problem lining up his glove while he does so. I wonder if this is how all bad Outfielders eventually adjust; accept that you suck, stop trying to be Ron Swoboda or Endy Chavez and accept that those balls are going to fall in. Limit the singles from becoming doubles and triples, and his arm is at least decent that perhaps he can keep runners scoring from first on doubles.