Without looking at the new requirements I would guess that any multi crew aircraft above 5700kg will suffice. I personally don’t think you will see a great problem with these new rules when they come in. It will just be like the old days when airlines required a pass in all ATPL or SCPL subjects and they did the flight test in a sim check or aircraft endorsement when it was required. The only problem I can see occurring is that the subjects may have a relatively short life expectancy, in which case Frozen ATPL’s for extended periods of time may be a thing of the past. You will have to do the subjects closer to the time you meet the requirements and your employer needs you to have an ATPL.