I think many businesses do use them more now that their routes have been adjusted. The experience isn't that much worse unless someone has high status on others. Especially if one gets status on Frontier, so the seats and carry on bags are free. The one drawback on Frontier are the schedule changes but most business travelers aren't booking much 3 months in advance. I definitely have noticed a change in the passengers on non Vegas routes. The DCA flight now looks like a United flight.