You can draft well and still miss the point. The Cardinals did plenty of tidy work and somehow never got around to quarterback, which was the need that mattered most. It washes out to a C+, no better and no worse.
They will need Walker to outplay his draft slot in a hurry to justify it. Linebacker was the priority and it is no longer a question, which is most of the job. Nearly every premium pick went to that side of the ball.
In the end, a coin-flip class: fine today, with a wide range of outcomes ahead.