Actually Step, I've been wondering - obviously knowing well your background - that you even consider there's such a thing as "good" handling.
Handling, ultimately, can mainly be "fit for purpose" to a particular extent.
The purpose of-course, of a Chipmunk and a C150 are not the same, although perhaps overlapping. Therefore it would be impossible for the two to have the same handling, and the same level of fitness for purpose.
Just look for example (apologies to non flight testers) at the massive concern presently in the FT community about how to get handling "right" for air-to-air refuelling, with just about every FBW programme in the world struggling desperately to get that "right", or even to define what "right" means.
G