It has no bearing on the court issues at this point, once the courts ruled it industrial design, the copyright had expired so they didn't pursue who 'had' owned the copyright as it was ruled expired and thus no ownership at this point...
Precisely. Questions of fact were dealt with at trial; not entirely satisfactorily but dealt with none the less
Who sculpted it was pretty irrelevant (legally at least) in any case as the trial judge stated any rights which might have vested in the designs, no matter who was responsible for them, belonged to Lucasfilm. If the ruling is overturned and copyright does attach it belongs to Lucasfilm not Ainsworth.
All that's argued at appeal are points of law, and whether they were correctly decided.