Sollolol,
That is usually the case, but one fight in particular (General Vezax) is one in which the only mana regeneration for Enhancement Shaman is Shamanistic Rage. No water shield, mana spring, class replenishment, etc. help for that fight. If we can get our mana bar back to full every MINUTE rather than every TWO MINUTES....well, there will be no need to even pay attention to our mana bars. As someone else mentioned, this makes the Improved Storm Strike pretty much obsolete.
If we're lucky they'll replace it with Earthquake...or Titan's Grip...or maybe Improved Feral Spirits (4 puppies that last twice as long).