The mpl student flybe do something like 60hr of single engine plane, 15hr of multi engine then 110hr of 737 !!!! Yes 737 but with Flybe SOP. Then they do a normal dash 8 type rating !!!
So it would be easy to convert them to whatever other type rating after the 737 module.
For the one already in, I spoke with some and it seems they can already convert their MPL in a CPL / IR / ME if they do appropriate training (not need to do the full stuff) or wait the 1500hr for the ATPL.