Training departments nowadays love the MPL students as they know aircraft systems and automatic flight modes quite well and have no problems with the type rating syllabus, not really a wonder when they have sat up to 100 hours in the simulator before beginning the type rating. Line captains disagree there somewhat, but not as much as expected.
Maybe so, but 1500 hours out there flying in command of a light twin, making all your own decisions, getting really, really scared, getting through it, gaining confirmation that, yes, you can fly, cannot possibly be replaced by an MPL, they may know the systems but can they really fly?