I agree that changing the way they handle keys probably isn't the best idea. But if you are going through all this nonsense about changing the way you achievements, cards, coupons, etc. are set up, but are still going to allow the games to be sold for 3 cents on external sites, you probably aren't going to change anything. I'm sure there are ways they could limit keys such that they didn't impact real devs too much. Or they could employ a real person (lol) to keep track of how keys are being used and step in if they feel that the system is being abused.
Like I said though, I don't think the asset flips are really a problem, I pretty much never even see them unless I dig into the storefront looking for them. It really seems like a made up problem designed to get Jim Sterling patreon subscribers. I'd much rather they spend their effort combating the toxic stuff they are letting on their platform, and frankly I'd prefer if they didn't even use the term "fake games", since it has long been an accusation leveled by a certain sort of gamer at anything they feel doesn't have enough guns in it.