I don't think we are on the same page.
The determination that "exculpatory evidence doesn't exist" is not the Prosecution's to make. Especially when the evidence is relevant to a Defense's theory of the case. Cavalier treatment of discovery rules - including this Prosecution's 6/7 months' failure to disclose discovery that is specifically related to the Defense's theory of the case - results in unfairness and mistrials.
The P's failures to be responsive to the D's discovery request (e.g. F-Memo matters, chain of custody, Libby's video, doctored clips of same) has become so bad in this case that the defense just made an appellate record detailing how it's been blocked by the Prosecution from getting timely discovery (6/7 months ago) such that RA's planned defense and use of experts interpreting evidence/discovery may be unrecoverably inhibited.
And so, while the exchange of discovery shouldn't be a problem, in this case, the failure to do so fully and timely might - in fact - be very problematic.