Really like your team, solid balance in your hitting.
As for weaknesses in your offense:
Your 3rd outfield spot, Votto is good but Dusty generally doesn't play rookies so its something to keep your eye on.
Vartiek is not the greatest but besides your top 5 (VMart, Martin, Mauer, Mcann, Johjima) catchers theres not much and I felt you made good use of your earlier picks.
I think you could use another backup for your hitting though, H2H leagues are generally geared more towards hitting so I might add another offensive player to your bench and drop Lowry because hes expendable because he won't offer much on a terrible Giants team.
Staff is also solid, nice job drafting some high k, low whip pitchers, seems to be the best type of pitcher in fantasy. I'd say you might need another closer only because I'm kinda unsure like everyone else on who ARZ's closer is, I'm sure Sherill is available, hes the closer for Baltimore; something to look at in case.
Your pitching is fairly young so lots of potential upside, your gonna hurt for a bit with Gallardo out due to injury and I think you could use another solid starter due to the absence of Gallardo for about four weeks.
Other than that I think your teams alright, I would definitely get rid of Lowry and find maybe a backup offensive guy or closer.