He's better in coverage. He has a lot more range than Church and doesn't seem to make those glaring missteps that Church makes. However, he's not much in the tackling department since he's not a big guy and I think his lack of wing span hurts him. I think Collinsworth is right...the safety position is becoming more like a hybrid safety/corner position in the NFL and that's why the Eagles have seen large improvement at safety with Jenkins and Thurmond and Byron Jones looked really darn good at safety. I think Heath is better as a rotational safety against 11 personnel to help stop the run and the pass.
At this point, Heath is sort of symbolizes the defense. I don't think he's the problem if he's put in the right position (backup, rotational safety that plays ST). But, he's not the solution and the amount of playing time he gets needs to be addressed.
YR