The main problem that I can see with this new PM system is the following: Let's say a member has a suggestion for EoFF, and PM's it to Loony BoB. Disaster strikes! BoB doesn't like this suggestion, so he decides not to raise it with the other staff. However, it just so happens that this idea is really wonderful and amazing and the staff would have enacted it had it been raised in Feedback, but due to the personal bias of Loony BoB, the great suggestion is not put into place.
And I'm not saying BoB would do this or anything, it's just that he's the only admin to have posted in this thread so he volunteered himself to be the example