I'll good job, with a few changes. First of all, WRT any of the UFA's you mentioned, they need to take a reasonable deal or they're gone, and I wouldn't bother giving Jerman a contract offer. I'd also let Shaud walk. Aiken I'm plus/minus since he's a good ST'er, but he offers nothing as a WR. Keep him unless someone better comes along.
As for the releases, I'd keep Anderson since it costs more to release him than keep him and he has starting experience. I'd also keep Adams. And I'd add Villarrial as a release.
WRT FA signings, trying to get Hutch, Shaffer (if he's truly that good), and Dalton will be nigh impossible. I'd take making a strong push for Bentley and a decent RT, and Ted Washington should come cheap (the Raiders will release him before FA starts, since as has been mentioned, there's no advantage this year in waiting until June 1st).