As a site owner I feel that our fundraisers would perform better if there wasn't a competitive aspect to P2P campaigns. Give site owners the option to remove 1st/2nd3rd place icons would be helpful.
In conjunction with the above, sorting parameters for the "Leaderboard" would help. Examples include: random, alphabetically, date (ASC and DESC), and amount (ASC and DESC).
If anyone has any other concepts, please leave a comment so the GiveWP can assess them.