You still have to bind to a specific tier, the new feature is allocation by policy.
I thought there was a feature in  76 code which allows luns bind to a policy instead of a pool.    I cant seem to find this option or maybe it doesnt exist ?    Is the feature now just protecting a pool from running out of space by allowing FAST-VP enabled Storage groups to allocate extents from other pools besides the it was bound to ?
FAST-VP : Binding to a policy