Vance plays a lot of two deep looks from what I've noticed. I haven't seen the break down, but the Cardinals have the appearance of a team that wants to keep plays in front of them and force teams to move down the field methodically.
Not a big risk taking type of defense, and it works well when the Cardinals have an early lead.
One of the reasons that paying Budda all this money was insane was that Vance doesn't seem to think you need dynamic defensive backs and when we were cooking last season, Budda and Thompson were playing back, and he wasn't making plays.
When we got desperate late in the season and Simmons was regressing, we started bringing Budda down into the box as a pass rush threat and in run support, and the pass defense came unglued.
It's worth considering that the Cards announced extensions for Keim, Kingsbury, and a bunch of the offensive staff, but it's been *crickets* about Vance and his staff. Would not be at all surprised if we look outside the organization. Seems like he and Keim have never seen eye to eye on personnel or system.