I think a number of airlines down here have found Direct Entry Command a spin of the roulette wheel. It sounds really appealing for management. But for all the great operators who come in and add spine, there are many who tax the training system or cause a heap of other problems.
Not adjusting to the company culture and rebelling against it seems the most common problem. Coming to L Cost after a 'premium' carrier creates a challenge to adapt to the DIY environment. Some people cope and thrive and a few certainly do not. By far the preference is to promote from within.