I think this a pretty well balanced, solid team. The weaknesses that stick out to me are Berkman as your starting 1B and then the depth of the offense as a whole. Obviously you have some really top level guys in your lineup in Kemp, Posey, Phllips, Hanley, and Beltre. I really like the speed power combos that you have going on throughout most of the lineup as this usually limits the amount of variance that you get throughout the season: this is very important in a head to head league in my opinion. You should be able to get a good amount of HRs and SBs every single week with this lineup. Again, the bottom of the lineup isn't optimal but considering how good I think your starting pitching is, I think it's going to be okay because you can also trade one of your pitchers to add more bats if you feel the need.
Keep your eyes open on the FA list for elite setup men with good ratios that have chances to be closers later on in the season. The guys I like this year are Jensen, Vinnie Pestano, and even Tyler Clippard (now that Storen is shelved for longer than they thought Clippard could end up with some save opportunities and has sick K numbers). Great job overall of not paying for saves and building your team around speed-power combos, getting solid players at the shallow positions, and having a deep rotation. I don't have much to criticize here... good luck!