Daniel,
can you provide more specifics? I am looking at my lab 56 that has been up about same time, and when I select planning tab from vsphere UI I get the page with the greyed out New what-if-scenarios... until I use the tree on the left and get to a cluster and host level, then it works as expected.
Might even be a program to licensing mismatch issue if you cant get to the planning tab.
David