Offer either an '030 or '060 via an expansion slot that can also accept PPC or PPC/060 combo processor card.
Forgo complete graphics compatibility and go RTG ( unles RTG slot can be made to coexist with an older graphics system).
Limit Zorro slots and use PCI slots for primary expansion.
Consider another X86 cooprocessor card that is better integrated into AOS.
Offer a tower and a unified desktop model (like the 1200). The later may not be able to have all the features listed.
Drop AOS in fovar of MorphOS.