Is there a reason you didn't include the A/D convertors in the expansion headers? Having these are very useful.
I was making a few procedural errors in the Vivado - SDK handoff, but I now have the 3-port XADC lab running.
Switching to Viv 2013.4 helped a great deal, in eliminating questions where the tool flows differed. Got the XADC lab up and running!