Trade feedback for BIF participants?

As somebody who has run a few sports related/ pool type BIFs, it would be nice to have a feature similar to trade feedback or incorporated into trade feedback where the organizer could send out a "BIF participant request" to everyone who agreed to participate in the BIF, and then have the organizer give feedback when they satisfy their shipping obligation for the BIF. It would be great if this was incorporated into the participants trade stats. I had thought about asking each participant in BIFs to accept a trade request from me as the organizer of the BIF, but that ends up with a "two way" feedback that's not appropriate for the format of a BIF.