First change:

I calculated quality of competition using playoff shots for and against, which ended up being meaningless, since players don't get the range of matchups they get during the season.  So I changed playoff Qualcomp to use regular-season shots.  I only ran it for 2009-10 5v5 so far.  The results are better than before, but not that insightful.

Second:

I wanted to standardize the stats sheets across 5v5, 4v5 and 5v4.  So PP and PK sheets now have Corsi-based QualComp and QualTeam, as well as Zone Start and Zone Finish - which don't mean much on the PP.

Let me know if you have any thoughts.