My argument is based on the assumption that once the embargo is lifted, importers would be likely to import cigars from Cuba in a similar fashion as they already do with cigars from other countries of origin and that a comparable tax pattern would apply.
This opinion is based both on how Habanos are imported to all other countries and the extensive history of tobacco importation to the US from other countries.
Unless a considerable markup is applied to Habanos by suppliers in the US to cash in on the newly available/highly desirable Habanos, one could expect prices closer to duty free than Canadian prices (state taxes notwithstanding, to be paid mostly on a self-declaration basis).
Food for thought...
Trust me, noboby does taxes like industrialized Commonwealth countries 😉