Roy is one of the better safeties in the NFL. The problem is that he isn't as good as Woodson was all those years.

This is a make-or-break year for him for a couple of reasons.
First, though, I'd like to address his tackles;  Cool, he makes a lot of them. All that means is that people beat him for 25 yards rather than taking the ball in for 6. It's worth something, but the fact that most of those are so far from the line of scrimmage says something.
Roy's biggest problem is with linebackers. What comes to mind for me is Romo's quote when asked about his troubles passing on the Dolphins, specifically the lack of a Witten connection. He stated that Zach Thomas made underneath routes to a TE very difficult. That's why I love that signing; he fills a need. We aren't going to be lit up by the Cooleys and Shockeys when one of the best coverage Linebackers in NFL history is plastered onto them.
If Roy's ineptitude in coverage remains obtrusive even with this weakness handled, it becomes painfully obvious that he's not worth his substantial paycheck. Jerry would feel obligated as a mentally active human being to cut his losses and part ways with Bad Roy.

Does anyone agree that we don't use Roy the right way? I know he is a Safety, but it seems like so many other teams blitz their safeties a lot more than we do. I think I remember him blitzing like twice all year.

Big slower corner at SS, than a smaller faster LBer.  That simple, has been forever.

I was a huge Roy Williams fan and elated when we got him on draft day, but somewhere along the way he's lost it.  He's still a pretty good tackler, but not great.  I'd rate him in the middle of the pack of NFL safeties.

He did seem better in coverage this year than last, but big plays from him have all but disappeared.  I'm surprised by how horrible a blitzer he's become, he simply cannot beat a one on one block.  Contrast that with a Rodney Harrison who excels at shedding blockers (and getting bitchslapped by Marion).

I was psyched when Wade moved him to nickel safety, I thought it would pay huge dividends.  Unfortunately he was mostly invisible.  

He's been on a steady decline and you don't see many players reverse that once it begins.  He no longer makes up for his liabilities in coverage with big plays, and with him getting worse, I'd rather see us  try to develop Watkins or C. Brown.  Hamlin would be good strong safety with coverage skills.

One question can sum up why people do not like Roy Williams playing for our team.

You are the defensive coordinator.

What position does Roy Williams play?

He is half LB/half SS, but not whole at anything.
He used to be whole at knocking heads off, but now he can't do that.

I like Roy Williams the man, but I hate the positional problem he causes for our defense.