Where is the angst with the coverage unit?

This that and the other about the kicker(s), but crickets on our punt return units. That unit took the giants game into nail bite country. That unit cost the ravens game(there was a block in the back not called), but the guy still wasn't taken down. I am more concerned with that unit than I am the kicker. Bad coverage can lead to short fields, or worse....those things can ring the bell with points.

The kicker is an issue, but the coverage unit is more dangerous a problem to me.