My roster has had Reggie Nelson released to free agency and Obi starting at FS for quite some time now. Unrestricted Free Agents from all 32 teams who have not had any posts or reports of them re-signing with the team have been released to free agency. I've seen nothing of Reggie coming back to the Raiders so he's been removed from the team.
As far as player ratings on existing players, that just opens up a door to a lot of dislikes and criticism. The only player ratings I don't mind messing with this time of year are free agents that I believe EA has too highly rated and newly created rookie prospects.