If any good comes out of this horrible accident, I hope it's that the FAA finally wakes up and abolishes Pay-For-Training Programs such as Gulfstream.
I won't blame the school directly, but scumbag operations like that allow pilots to leapfrog over vital flight training experiences while pushing quaified applicants to the side.
The main issue here is that you can't substitute a qualified, experienced aviator with a less experienced aviator who is eager to fly at any cost.