Matching personnel is vital but what I meant was that it should not be a universal rule.
If I am playing against the Patriots they can come out in a 2/2/1 set all they want but I am staying in Nickel. With some teams I treat the TE as a WR. The last thing I want to see if I am the Ravens is Suggs or Dumervil trying to cover a guy like Vernon Davis.
As for blitzing to stop the run, it is often overlooked. Too many people think blitzes are only designed to get to the QB. However not all blitzes are equally effective as run blitzes. Opinions differ but I avoid man blitzes if I am expecting run. There are some exceptions but man blitzing is risky. My opinion is that the best run blitzes are zone blitzes, particularly the scrape blitzes and safety blitzes (my go to run blitz is SS str snake 3). Of course if they run away from the blitz it is less effective.
Edit: I will man blitz versus a run out of the 3-4 but I try to avoid it if I run a 4-3 or am in my nickel package.