I think, since you've talked to them and they're aware of the problem, that it would make good sense to dive the suit, reserving the right, if the dimples cause any issue, to send the suit back for a free replacement. That way, you get the best of both worlds -- You have the suit to dive, and no cost if the seal eventually leaks. The shop has the best of both worlds -- They don't have to replace the seal unless or until it does leak. Sounds like a win-win to me.