It's hard to tell perhaps in the diagram of the earlier version, but carl is right, the outfielders are one-way assaults to the infield (which makes sense, no point in throwing to the outfield).
Besides that, wow, nice job, love the revamp and glad to see this moving forward
The stripes in the grass are a nice subtle touch, you could do similar things with the infield dirt... the basepaths for instance are usually hosed down periodically between innings and thus darker. Along that note, the dirt itself should probably be less gray and more light brown.
Also, if you wanted to include some 'window dressing', you could put umpires at each base, and put in the outfield wall with foul poles. I'm not sure if you had further plans for the background, but this map might be better off staying relatively simple- if not, you might consider adding stadium seats, vendors, dugouts or bullpens, batboys/batgirls... but I don't think the map needs them.
Marshal Ney