Well Yee IS a lawyer as well as an agent, and a highly respected one at that. This isn't just any run of the mill agent or a Jay-Z-type of "agent-on-the-side" spouting off at the mouth. It's highly likely that the reason he HASN'T released his notes is in case he DOES have to file a lawsuit on behalf of his client.
It's also possible (although I don't know how likely) that while he is calling out Well's credibility publicly, he's also giving him a chance (in a backwards, roundabout kind of way) for Wells to release those details of Brady's answers to provide that context. Hence the, "I have verbatim notes, and I don't know why they weren't included because they should have been" (paraphrased) statement.
Also keep in mind that we don't really know what confidentiality restrictions are placed on Yee by Wells, the league or Brady himself. Yee can only release that information if Brady says it is o.k. to, and if it doesn't violate some sort of confidentiality agreement that may (or may not) exist. At any rate, let's not demonize the only person (so far) that is involved in this situation that has really gone to bat publicly for Tom and will have his best interests in mind no matter what. Especially when we don't know what he has been authorized by Tom himself to release. If Yee has the notes, most likely Brady has at the very least seen a copy as well so it's hard to slam Yee for not releasing the notes when TB hasn't either.