I can see you spent a long time thinking about this so gj for that. But in my opinion it's a terrible idea, locking the market off to a huge majority of users is stupid.
Having people jump through all these holes, earning all these different types of feedbacks for different types of trades is again, stupid.
What makes the market appealing/keeps it thriving is the fact that there aren't any requirements, and that you can trade freely. If this type of regulation was introduce it will kill the market.
99% of people that get scammed are at their own fault. They either don't use their common sense (thinks the guy buying gp $4/m is legit), or they didn't use trusted a MM.
There is no reason for a whole new system to be implemented because a small percentage of people are incapable of conducting trades safely