It sounds like companies can still go through that whole 211 FINRA back and forth process, but why would they, when going though OTCM is going to be much faster and more streamlined. New companies will even be able to pick the date they want their tickers to begin public quotation, and start trading.
Also, it sounds very simple what will be needed for the Pink Limited tier, pretty much just the most basic, minimum public info, and those can still be quoted...however, there is no guarantee all brokers will allow trading on them. Though....I have not heard anything specific in regards to this yet.
This is pretty informative and worth the hour long listen, they don't seem to know exactly how everything is going to go down with shells, but the days of shells taking many years to find mergers, and remain quoted are gone....18 months that's it now....no more quotation after that.