[NTG-context] \skipenumerationcoupling in mk4 and other troubles

Dear all, with today's beta, I am trying to use \skipenumerationcoupling without success. A sample project is attached. Will this stay an mk4-only feature? Also, I still have major misnumberings of all enumerations in mk4. They come out as I want in mk2, but I have the hunch that I am using erroneous code in the setup that is tolerated in mk2 but not in mk4. For instance, does \defineenumeration [exercise] [before=\blank, after=\blank, way=bysection, text=Exercise, start=1, location=hanging, letter=rm] make sense in mk4? Thanks, Matthias