Overall, the talent increases the effective DPS of Fire Blast by allowing the mage to cast it more often. It is viewed as a PvP oriented talent since the DPM of Fire Blast is too poor to be used heavily in most PvE encounters. Nearly every mage uses Fire Blast regardless of spec, and as a tier 1 talent, it is easy to pick up 2 points.
Patch 4.0.1 - Removed cooldown reduction. Added spell critical chance. Added increased range.
Patch 3.0.2 - Talent was moved from tier 2 to tier 1, reduced from 3 ranks to 2, and changed from 0.5 seconds to 1 second per point.