Mesa
You also mentioned Mesa. I instructed there, too, and I thought you'd like a few comments.
Mesa Airlines Pilot Development is different from FlightSafety. Mesa's school trains its students from the beginning to be pilots for Mesa Airlines. The students receive training for their Commercial-Instrument-Multi and a two year Aviation Technology degree from San Juan College in Farmington. It has similar degree programs set up at Arizona State and Midland College in Texas (I believe that is the correct school). Graduates leave with 300 hours. Those who do what they're supposed to do and act the way they're supposed to act will get an interview with Mesa Airlines. The program works. I worked there only for a term, but I know that at least four of my seven students got on with Mesa.
You might be asking, why only four of seven? For the reasons I stated above. MAPD students are scrutinized closely from the moment they start training and the bad actors are identified quickly. I had two such persons; one of whom actually flew decently but did not act decently. He was an AF veteran and felt he was owed. That is
not the way to comport yourself at Mesa, or FSI, or any school from which you hope to gain employment!
(I don't know what happened to one of my students and the other was another problem type.)
Mesa is not an accelerated program. Quite the contrary. It is an eighteen-month program. You take one flight course per semester along with your other college courses. I don't recall any of my students taking a full load. Most already have degrees or some college and are taking enough courses to meet the A.S. requirements. That's the method I would recommend, because taking a full load and flying at Mesa is a major workload.
Contrary to what many people believe, MAPD is not P-F-T. Although you are imbued with Mesa line procedures from Day One, the tickets you earn at MAPD are good anywhere. MAPD does not offer a CFI program.
Finally, although you might get "the interview," from that point on you are on your own. You are not a shoe-in for a job, although the contacts you may have made as a student might help you. And you most certainly aren't a shoe-in to make it through ground school and training. You might be ahead of the game regarding Mesa SOPs, but the street hires, who have been around longer and have more experience, will catch up and maybe go past you. You'll have to work as hard as anyone, maybe harder, to make it to the line.
Hope that helps some more. Good luck with your decision.