Bruce wrote:

The Duo passed the same JAR - now EASA certification that the DG1000
etc. did.
That means they have to limit the speed to below Vne in a relatively
shallow dive. (30 degrees)
....
The no aerobatics certification appears to be simply a liability
limitation.

No. JAR 22 requires 30 degrees for all liders, but 45 degrees to be
certified for aerobatics and cloud flying.