This is totally your opinion, but I would bring this stream to the PFBC's attention. I come to this conclusion by talking to Mike about a similar such situation of a stream that I know of. Well, actually I am talking about a stream section. It is unlisted, but I guarantee it is Class A many times over. I think it affords the stream some level of protection being listed, but it is also might add increased pressure. I really don't think it does, though. Our natural repro list is huge, and I don't think being on that list really brings too much attention to the water.
I did not bring my stream section to the attention of the PFBC, but I plan to soon.