This right here is the #1 fatal flaw. The fact that you can't support two apple thunderbolt displays out of the box should have been a red flag.
To say we can only do "one" is pretty messed up considering the Iris graphics which uses system memory has been used for a decade plus.
To me this is a no-go, I could even rationalize it on the new macbook air or pros 1st generation, but on a mac mini? Wow just wow.