My point is, why not require that your European student also get a Class One medical from the FAA? By that sort of logic, Lubitz, needing only a Class Three from the European authorities as a student ... why require him to have a Class One instead?
Come to that, why should the FAA require another medical of someone who holds a valid LBA medical? They accept the foreign license, so why not accept the foreign medical?
Requiring a student to have a Class One medical instead of the bare minimum Class Three would be taking a "belt and braces" approach, adding one more check for a candidate for a professional career as a pilot.
If this suit goes ahead in the States, I would expect this issue to come up. It will be interesting to see if it does.
If you have obtained a foreign license, then you may have noticed how you end up duplicating a lot of the checks and tests that you have already been put through by your home authority, when that higher class of medical would simply be one more of those.
It would be interesting to know if the school now requires an FAA Class One for its student pilots, as one more way of trying to catch the next Lubitz before he gets too far in the system.