No. There is not. Just watch out for sag -- yawning besom pockets aren't a great look.
I think the best solution to sagging pockets is to have a tailor sew them shut. Now, I would not leave them shut from day one, it would look to odd to have prefect streamlined pockets, but if they do eventually sag, by all mean s, shut them. As to pocketing flaps inside, that is a no-no. Jon.
I agree with Jon. There was a period of several weeks where I really liked the look of jetted pockets. Having only flap pockets on my jackets, I tucked them in. It didn't look quite right. Suits with flap pockets are meant to have flap pockets, and they need to be on the outside.