Couple this with some other things I learned from the agent at SLC, including (1) she was told they are laying off all outstation staff, in fact nearly all of the employees other than in DEN, and replacing them with outsourced contractors, and (2) they plan to start charging for carry-on luggage.
With all due respect, I am not sure you can count the opinion of someone in her position.
The fact that Frontier is outsourcing ground staff at all outstations is widely known - and 60% of the Frontier outstations were already outsourced when the decision was made about the rest.
The surprise is that it has taken this long. Many airlines can and do outsource at outstations - Southwest has a union agreement that it can do so at any station with fewer than 12 daily departures.
No Frontier outstation has that number of daily departures.