My 6501 also has the pull up step. This is a pretty important feature for us since we use it to access two stacked poly 66 quart clear storage bins in the hold. We use these for his/her clothes storage.
The 4" deep 'closet' wasn't cutting it for us, so we turned it into a kitchen pantry for dry goods, spices. The shelf unit left a little room to one side for 2 coat hooks for daily jackets.
Back to the the hold access...in a perfect world I'd replace the plywood and carpet door/step with 3 drawers...somewhere around 1 ft. talk each by 3 foot deep.
Its funny that so often I get comments on the size of the pass through hold when I have it open...even from travelers with much bigger rigs. It was a major selling point for me. I've often wondered if I could get an RPod in there if I had a running start.