troy: this is a real SWITCH with routerOS features addon. Why the hell do you need more then a gbps connection to the CPU (what cannot handle more than few hundred megs)?
Think about a managed gigabit switch plus a dual port mikrotik router - in one box (ok it offers more, but not expect too much...)
It would be more accurate to say it's a switch with a SINGLE port MT router. All traffic in/out of the CPU (router) is restricted to a single GigE interface. That means that when traffic is routed between Ether1 and Ether2, it's moving on a shared resource. Putting dedicated uplink ports on dedicated GigE lanes would improve Layer-3 performance dramatically, though never a full gigabit since the CPU still wouldn't be able to handle it.
With regards to performance, if a PPC could get Layer-3 to wire speed, it would probably be well worth the increased cost.
The bottom line for me, is that for the money, this unit is hands-down the best anyone can ask for, but that doesn't mean that the development of this device wasn't short sighted or that there's no room for improvement.