Toying with Hpal on Beta for a bit and it is going to take time to adapt to the new play style. Probably will not feel right and play off until we get our conduits, legends and covenants.
On a side note I rolled up a disc priest on beta as well and man I feel hpal is going to be far outclassed by disc all the way. The disc spec in my opinion should get a new Tier above S Tier.