I wouldn't expect a resolution until online travel agencies modify their software to treat Basic Economy as a separate class of service, which they will only do if there is sufficient demand.
What's interesting is that for the big Expedia consumer sites, Expedia and Orbitz (but not Travelocity) now do allow you to upfare from Basic Economy to regular Economy, so I'm hopeful that other travel providers will eventually modify their software to allow the same.
Did we once determine that Connextions uses the Expedia platform, or is that only for their hotel bookings?