EDIT I just saw a thing on the Lightning Network which I didn't 100% understand but get enough of to see it is different than this (off chain) would Alan not be the perfect remedy to prioritized tx?
The impression I have of the Lightning Network is that it will be centralized and therefore open to regulation. It might suit off chain high frequency micro transactions, but exchanges do that anyway and most of them are being regulated. Prioritized transactions will also be channeled through a centralized pool, and I wonder if that too will be open to regulation by whatever country the owners reside in.