I think 4 QBs is a little excessive, unless that's how most of your league panned out? Do you only start 1? If so, I'd drop Dalton and Weeden..
As for how young your roster is, it's definitely a noticeable trend in the NFL and in many fantasy drafts, but it doesn't mean it's necessarily a good one..
Players who have been producing for years at certain positions are being overlooked for "breakout talent", but there are many question marks and it's a very up-in-the air way to go about things..and I've fallen victim to this as well, so I'm not trying to be a hypocrite here
people are taking AJ Green and Julio before players like Larry Fitz, Andre Johnson - I have done this too but it's admittedly risky and stupid considering they have only played 1 year, albeit great years
people are also taking players like Doug Martin and DeMarco Murray over players who have produced year and year out (i.e, Michael Turner, Adrian Peterson)
What I'm getting at is that the NFL is a rough league, and unproven talent is a risky play when there are no sure things compared to already established players..then again, you're in a keeper league, so it's all about the future - unless you wanna win this year (not saying your team can't, just saying there's a lot of ?s)
12 Team PPR BIG $ LEAGUE
QB - Matt Ryan (J. Freeman)
RB - Arian Foster, Reggie Bush (Ballard, Starks, Bell)
WR - Julio Jones, Brandon Marshall (Nicks, Britt)
Flex - Eric Decker
TE - Jared Cook, (G. Olsen)
D/ST - MIA
K - S. Graham