One thing I'd like to see is an Amiga audio pass-through included with one of these boxes or even seperately. Many of the Mediator supported cards have mutiple audio in ports and providing some kind of Amiga audio to audio card connection would be great for those programs that don't support AHI or some other retargetable audio.
I rigged up a patch cable to do this, but I had to route the wires from the external Amiga audio ports and in through one of the PCI holes to connect it to the card. Not pretty.
The other thing I would like is for these boxes to secure the A1200 internal expansion cards. My Blizzard PPC card flops around in my E/Box 1200 and it makes me uneasy considering how much I originally paid for it and the rarity of them now.