Good team. I think you're solid at all positions.
Your QB position is a little weak, but I think Ryan is being overvalued this year. Maybe he'll prove me wrong. I'd really consider playing matchups and occasionally start Hasselbeck over Ryan (I've got the same plan with Cutler & Hasselbeck but have Cutler ranked above Ryan).
White is a good WR1 and I don't think there's any problem with the Ryan/White combo. I'm a little down on TO right now. His injury is a little worrying. Even if he is back for the start of the season, he's missing out on practice time to learn the new offense and Buffalo does not have the weapons that Dallas did. Royal should have a great year though and I'd start him at flex. Mason is solid as a WR4.
Your Gore/Jacobs combo at RB is great. I think Bradshaw is more than just a handcuff and a decent RB3 but he only has upside if Jacobs gets hurt and even then he probably is in a RBBC with Ware. McCoy could have value too but probably only worth starting if Westbrook is out.
Witten is a great TE but will be sharing more looks with Martellus Bennett this year. I had him as definite #1 TE before preseason, but he fell a little with all of the 2 TE sets Dallas plans on running. I still see him as a top 5 TE lock though and Bennett even has an outside shot at being top 10 (though I'd rather gamble with other TEs, I'll still be watching him).
Overall, B+. Your top 3 players (Gore,Jacobs,White) are a great foundation in a 12 team league but QB seems a little weak. I think you've got a good all around team but are lacking a couple of mid-to-late round high-upside guys (I only see Royal and maybe McCoy) that could push you over the top. It's those high-upside guys that significantly outperform their draft position that win championships.
How's my team? http://www.fantasyfootballcafe.com/forums/viewtopic.php?t=441746