I don't see how that is so hard to understand.
It's not hard to understand; it's hard to believe! Big companies don't go on "understanding" alone, because when they do, one company or another will fleece you for all you're worth. Disney charging twice for the same channels comes to mind.
So, until somebody comes forward with intimate knowledge of the carriage contract that states otherwise, I continue to expect Tribune to supply Dish with the entire guide since Dish is paying for it, and I expect Dish to provide that info on OTA channels that are still available to those of us with an antenna. If the carriage contract has expired, then whatever clauses it has in it have also expired. So what compelling reason does Dish have to replace the guide on OTA channels with the useless Important Info? Have they signed a contract in perpetuity that states they cannot use 3rd party guide data? Well, maybe, but that also strains credulity.