Let's watch McD away from TB and BB before anointing him.
You also wanted to anoint McVay before he had a track record. He also seems to be more reliant on having lots of cap room because of an underpaid QB.
Butler looked like a bad DC when he had little talent in the secondary. But he was getting insane sack numbers. Then we dramatically improved 50% of the secondary with an elite safety and what looks like a pretty good corner. Suddenly, he looks like a good DC.
It's not clear how much the coaching changed (we added a secondary assistant too), but we know that the talent got much better.
You also wanted to anoint McVay before he had a track record. He also seems to be more reliant on having lots of cap room because of an underpaid QB.
Butler looked like a bad DC when he had little talent in the secondary. But he was getting insane sack numbers. Then we dramatically improved 50% of the secondary with an elite safety and what looks like a pretty good corner. Suddenly, he looks like a good DC.
It's not clear how much the coaching changed (we added a secondary assistant too), but we know that the talent got much better.

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