Basically we are looking for meaningful feedback. This means access to information. Integrate "loan shark", "market trades", and "staking" feedback into the players' profiles. This way you can click on a player's name and get all that info at the source, instead of the current way of clicking the market to check feedback there, then clicking loan shark to check feedback there, etc.

And Drywallman's suggestion of making feedback more accurate. Mostly, if someone forgets to add feedback or rate the buyer/borrower/stakee, then it doesn't go towards the person's credit rating. Currently there are some skewed credit ratings due to bad or non-existent feedback.