Kirby is poking us in the eye.
If UAL is having Mesa go into ATL in order to compete for passengers who would otherwise be flying on Delta that's just plain silly. Mesa is not a good representation of the UAL product and would be akin to sending in Peter Pan in against Godzilla. The passengers will be ****ed they had to tolerate Peter Pan's lack luster enthusiasm and will be bored of the constant excuses why Peter just didn't have enough ferry dust to bring Godzilla to his knees. Meanwhile. Godzilla enthusiasts will be enjoying spacious-comfortable jets on transcontinental routes connecting their global needs with efficiency and a high level of customer satisfaction.
Kirby doesn't care who represents UAL in competing with Delta. It's a big mistake. Need to tighten up scope. Passengers just look at the logo on the tail. They really won't know it's Mesa, they'll think it's United. Kirby won't care either.
Problem is: ATL, like EWR and other busy major airports are slot limited. If you have slots into ATL then don't waste them on RJ's. The footprint of an RJ and ATC spacing requirements are the same for an RJ or a 737. Better to use a 737, put in more pax, make more revenue, and better utilize the slot. The bonus is it would better service our network by connecting more passengers.