Well, yes and no.
Yes, McDaniel and staff are coaching and utilizing their offensive players much better.
But defense is pretty much the same and was already in place.
Furthermore Grier should get credit for beginning the change. He ultimately drafted Tua and Waddle and Holland among others. He also was responsible for the Tunsil trade which was a big part of setting this all up.
Furthermore, we see that he’ll acquire players the head coach wants. Hence Tyreek and Armstead and others.
Most of all, he (and Ross) made the controversial decision to fire Flores and are responsible for hiring McDaniel who was a bit of a underdog hiring.