I don't know if this has been suggested and I would be surprised if it hasn't been requested. I looked through the forums and I saw similar requests but I didn't see any that matched exactly what I had in mind.
I would love to see a stat that lists winnings with rakeback calculated in. I know I can see this on the graph but I would like to see it on the 'Overall Winnings' report. If this already exists, then I don't know how to add it. I don't mean just a stat that shows how much rakeback has been earned so I have no add up my rakeback+winnings myself. (That sounds kind of bad. Such a lazy species we are becoming.)
Another similair stat that would be nice to have is a winrate stat that includes rakeback/bonuses. This would show the true winrate for the player because at the end of the day rakeback is part of your winnings.