The MPL situation is difficult; similarly, a significant number of ex-Flybe MPL cadets have been left high and dry with no physical licence, some already flying the line, and others waiting for a base training slot. They effectively have nothing to show for a very expensive course of training, and even those with some experience on the Dash were left practically unemployable prior to the Covid-19 situation. Most had no previous experience therefore no PPL to allow their ATPL TK credits to be attached to anything, and I understand a number were seeking a path to obtaining a PPL so that they could at least apply for a modular route CPL utilising the TK and flying credits earned on the MPL course, and making good any shortfall. They have been left in a precarious situation with an uncertain short-term future whilst trying to obtain a lower standard of licence at additional cost!
I don't feel MPL is properly understood by most candidates entering the industry - there is an understandable appeal as a result of the course construct which suggests a strong link between the trainee and airline but that is meaningless without the job, or a tangible flight crew licence at the end.