Apologies, bose, I missed the DO28 in the EASA list. I was fooled by the CAA still publishing it as a national rating. However, the comment still stands for the Finist and Glasair II/III SET.
I finally found reference in the Expanatory Note to the meaning of 'complex' in relation to the NPA, which refers to the definition in the basic regulation and not the JAR-FCL definition. Consequently, complex in this context means an aeroplane with a maximum certificated take-off mass exceeding 5 700 kg, or certificated for a maximum passenger seating configuration of more than nineteen, or certificated for operation with a minimum crew of at least two pilots, or equipped with (a) turbojet engine(s) or more than one turboprop engine. Consequently, a CRI will be able to instruct for SET class ratings but not for any MET type rating (or for SE turbojets when they arrive).