Here is the code section
210.7(B) Multiple Branch Circuits. Where two or more branch circuits supply devices or equipment on the same yoke, a means to simultaneously disconnect the ungrounded conductors supplying those devices shall be provided at the point at which the branch circuits originate.
Question is, will the inspector even know to look? Take a 14-3 to a receptacle during rough - everything looks fine. Go back for a final inspection - as an inspector I know that I don't check every receptacle and which breaker is feeding it.
Agreed, if he breaks the tab off between the neutral screws too and runs two separate neutrals to go with the hots. The OP didn't elaborate on that aspect so the first thing that came to mind is how I would do it. There are pros and cons to either way I suppose depending on the job.