Cool find, but I wouldn't exactly expect it to do much in the terms of wondrous hardware discoveries. It is, after all - simply a prototype system from almost 20 years ago that came in between OCS and ECS, and wasn't a terribly huge step up to begin with, IMO.
In terms of a working history of the Amiga, it's a big find, though.
I think it would have been an improvement over even AGA because of the dual-ported VRAM.
I don't think you would see the same slowdowns that AGA experiences running 7 or 8 BPP in multiscan mode.
ECS was the real disappointment.
