Why would anyone care what Dansby thinks???
I don't expect that you would care, but to an unbiased observer, I'd suggest that Dansby has a unique window into the Cards coaching staff because:
1) He was on the team last year
2) He was a leader of that team
3) He is no longer with the team but left on good terms
4) He's free to say whatever he likes.
Being in the NFL isn't like being in the insurance industry--it's a pretty tight brotherhood, and it wouldn't be surprising to have Dansby in some meeting rooms with Bettcher since they were in the defensive front-seven. If Bettcher seemed to leave no impression on Dansby, it isn't damning, but it's one more data point than we had before Jurecki called him up.
You can't really trust current players to put forward brutally honest opinions on their coaches. It'd be fun to ask John Abraham.