The mod did not change from 2012 to 2013. I haven't ridden the rocker version, but the cambered mod is a beast. Pretty aggressive freestyle board, great for jumping. I'm sure the rocker loosens it up a bit, but unless you're a big jumper or aggressive rider, it might be a lot for midwest park riding.
I'd suggest looking at something a bit softer - boards like the Capita Outdoor Living, Ultafear or Horrorscope. The outdoor is flat camber, will still be fun and forgiving in the park, but will definitely handle anything you throw at it. The ultrafear has rocker outside the inserts and flat between the bindings, but still a mid-flexing deck that'll be fine anywhere. Horrorscope is the softest of these boards, more of a jibber.
My advice, find a board you are psyched on and get it. Whatever you buy will handle anything you are able to.
Fine one that seems right to you, go for it and own it. Agree with the Mod-rocker statement. Might be a tad much for you on the flex scale of things, BUT, for the price, and given what it is, and knowing it's not THAT stiff... it's still going to rock your world, or do I dare say 'mod-rock' your world. HA!