I'd like to see a true 3D-pattern hybrid. Great Plane's Venus lacks elevator authority to make it true hybrid. So far only Hangar 9 has a true hybrid in the Showtime, and OMP Fusion X3D is a true hybrid. Fliton's Inspire 60 and 90 come close.
To circumvent copyright constraints, GP can just create a fantasy model but with the physics tuned to behave exactly like those.
It be great to be able to practice for so called 'artistic' aerobatic sequencs. So far there is no such model out of the hundreds available for RF3.5.