I have been unable to find any research on whether or not the leaf stomata are open or closed in fully dead leaf. Regardless, my assumption is that if water vapor (a gas) is capable of entering a dead leaf, then ozone is also capable of passing into the leaf. Many of the molecules that are oxidized during curing and aging are organic molecules. Hydrolysis without the assistance of a catalyst occurs at a glacial pace. In the case of cured tobacco leaf, the catalyst is organic--an enzyme.
I will emphasize that I am guessing here. My intuition says that exposure to sufficient ozone alters the aging process.
Bob