I agree with the assessment as of now. However, I am curious if he actually improves. Hear me out. Safety is a position that is less physically demanding than say CB and is instead more cerebral (schematically). As safeties mature into their later years (going into year 10 and beyond even) they see the field better and can predict where the ball is going (and where it's not), which is an effect of experience. When the guy is new to the league, it's difficult for them to make calculated risks (i.e. BM). He's by no means a physical specimen of an athlete, but I wonder about how his experience may materialize into better play (he's entering his 7th season).
When we first acquired Rodney Harrison, he was in his 9th or 10th season (drafted in '94 I want to say). Some were saying he should retire (in San Diego) and he instead signed with us for 6 years. Someone else said it--we acquired him at his peak, which was in these more mature years.
Sanders doesn't have 'It' but I wouldn't be surprised to see him more involved in plays like the game-ending interception of Peyton Manning. He's learning where to be because he's seen it all before, and by most accounts he supposed to be a hardworker. Not all safeties mature into your Rodney Harrison's of the world, and Rodney was likely better in his early years, but it's something to keep an eye on with Sanders. I'm not suggesting anything eyepopping, but a gradual improvement when we otherwise expect that the player is-who-he-is at that point in his career.
Just some musings.