Yeah! The one above the mana bar on the normal UI on the PTR. There is a TINY one that is above your character with your health bar on the PTR, but a nice big one to track constantly would be more efficient.
Here is the screenshots. One is from the unit frame, the other is from that bar that pops up during combat under your character. The one that pops up is weird... it doesn't even show mana, just hp/maelstrom. If that went away and was just a bigger maelstrom, that would be sick.