Every park has the same SS and 2B dimensions. The SS at Fenway even has to deal with bounces off the foul territory wall to them.
Catching at Fenway is easier, since the back stop is closer.
RF is way more difficult than most parks.
CF is quirky and maybe more difficult.
LF is "easier," but learning the wall can be tough.
To me, our defense looked as bad as I have ever seen it, last year. When Story played almost FT, it improved, but was still awful.
SS was 30th, until Story moved it up a few notches.
2B was worst, and now we look to have an average defender who might become plus, someday.
1B & 3B have the same guys, so I'll leave that as a push, despite the idea that Casas improved over the year and could be better.
C should improve, slightly as Wong and McGuire near the normal age of catcher maturation.
OF is tough to call, since we don't really know what the alignment will be. Less Yoshida in LF maybe cancels out less Dugo in RF. The more we see Duran in LF, instead of CF, the better our OF D will be. The more Rafaela plays, the better the D is. Abreu is largely unknown, but looks okay, at worst. O'Neill in LF is a plus- in RF, probably not as good as Dugo.
I think we move up from 30th to 21-24. With the right guys playing, maybe we can reach the middle tier.