We’ve been through this process often enough where we don’t have more creative solutions for you that aren’t likely to cause other problems. In our eyes, the best solution is to back up and make the necessary corrections. So, I don’t think you’re going to get anyone to agree with your option to follow the slope of your top.
But if the slope wasn’t something that bothered you for many years, maybe you want to just do that and have your starter course ever so slightly more level. If it doesn’t bother you, it doesn’t bother us. We’re just trying to do our best to give you the best advice. We know how difficult it is to remodel.