Is there a limit per person to purchase starter packs? Not having a limit at all for those feels like creating a new chaos legion problem... Which wouldn't be too bad, since it will make it cheap to get a decent starter deck, but will destroy the value of rare and common cards.
I read through the article (and comments) twice to make sure that I really didn't oversee a proposal to prevent that - if I did in fact fail at that, nevermind :-D Otherwise, something like a power-limit or a limit per account could lower the risk of having common and rare flooding the market.

Love the rest of the ideas! It looks like you really took your time to think this through, and I hope it all goes well. Definitely have my vote.