What specifically do you think is within the commerce clause authority presently that shouldn't be? Certainly regulation of products that are imported for sale or sold across state lines is within even the most restrictive commerce clause reading.
Regulation only of commerce between states, not regulation of every single product under the guise that people might want to buy it across state lines.
That means that if a local farmer wants to sell hyper-organic meat that doesn't have certain USDA-mandated chemicals, they should be allowed to as long as they don't export it across state lines.
That also means that if Pfizer wants to make a drug in my state and sell it here, I don't want the FDA involved. I'll take the bad with the good.
While we're at it, I don't see anything in the constitution about banning Marijuana either, I think they do that under the modern reading of the commerce clause too.