I know I am late to replying for this, but that's a really good analysis Patrick.
I'm surprised we've had three consecutive seasons in a row of such active storms getting named.. despite having a modification in the Saffir-Simpson scale to only factor in wind to categorization in 2010, has the NHC been more ambitious to naming the storms?
Also, I have a feeling that Isaac and definitely Sandy are going to be retired. Maybe Debby, since Debby did indeed cause a fatality and it brought some record flooding to west-central Florida.
Overall, I was impressed with this year's Hurricane season. Despite, back in the summer, signs of El Niño developing (which aren't very much so true right now), the Atlantic had a fairly active season, IMO.