what do you expect?
PCIe SSDs, a form factor only slightly larger than the current AppleTV at most (maybe retaining the thickness of the current mini while employing the footprint of the AppleTV); no more FireWire 800, one Ethernet port, two Thunderbolt 2 ports (the only reason why the Haswell iMac and MacBook Air missed out on them is that they were released before the Thunderbolt 2 controllers were available), 802.11ac, audio out or audio out/in dual-port only (Apple has assumed that if you need to record input, you'll buy a USB device that will be superior to what they would've offered). Iris on the standard model, Iris Pro on the higher-end model. Should the Mac mini Server continue, my guess is that they'd increase the size to accomodate a second PCIe SSD blade unless Apple is going to encourage the use of USB 3.0/Thunderbolt storage, which would've been faster than the bus speed employed by either of the current Mac mini Server's hard drives. Dual-core i5 on the entry-level model, Quad-core i7 on the higher-end and server models just like they do now.
Either way, a redesign is coming, if for no other reason than to complete the transition to PCIe-based SSD storage, which Apple is obviously invested in given the Haswell Macs and the Ivy Bridge E Mac Pros.