Sorry It is really 3 different things.
1. listed in % of completion of cards of a player Which we have but hard to compare
2. listed by number of cards compared to other players in your collection Rank in your collection Which we have but hard to compare
3. listed by number of cards compared to other members haves. Ranking among other members Which we have but hard to compare
What is wanted ?? (if I understand correctly) is to have an area(s) where all of your players are listed for the 3 things. So we can compare easy. So we do not have to go to each player to find the information just to one place (report). As of now you can go to a player and see the % of haves and the ranking of that player to all other players you have. Go down a ways on the page and you can see the way your collection of that player is to other members.
Doing this could be hard as things will chage every mintue. So maybe it would have to be a report that people could run. Like the trading report maybe only every week or so. It could take a lot of time to run a report if you had a lot of players.
I may be wrong with what OP wanted but I would be happy if it was done. Just something fun and interesting knowing but no big deal.