I think they are definitely more strict, so I at least I will have to update the nameprep tables.
The problem is, with the old nameprep I only have the relatively small exclusion list, now they are using the rather bulky inclusion list and special attention must be payed to the join-controls, supposedly mapping of these join-characters depends on the context.
There are two subdivisions of CONTEXTUAL RULE REQUIRED,
one for Join_controls (called CONTEXTJ) and and for other
characters (called CONTEXTO). These are discussed in more detail
below and in [IDNA2008-protocol].
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