Team looks decent, but my first impression was that outside of Fielder it lacks some elite star power. Your team should have a high BA, but may lack some power b/c of your outfield. Heyward is a rising star, but will he produce anything this year? Who knows. I definitely like your infield much better than your outfield. Maybe look to grab some productive guys who didn't get drafted as the year goes on. The Corey Harts and Carlos Beltrans who may have gotten overlooked.
Starting pitching is decent. Webb could be a cheap ace this year if he bounces back to his old form. Billingsley faded in 2H last year, but if he pitches up to his potential he's a sold #2 starter. I'm not high on Harden (injury concerns) or Price (inconsistency), and of course, Strasburg is in AAA. With regards to your RP, where will the saves come from?
Scour the FA list b/c my hunch is that there are some better guys still out there than some that are currently on your roster. But maybe not, given that it's a 12-man league.
I'd appreciate your thoughts on my team as well - entry titled "How's This Team?" Thanks.