2 min cooldowns, what else
      

  Diablo II had a single resource mechanic (mana), and the biggest end-game skills in Diablo II are low-to-mid tier skills in Diablo III. The big end-tier skills we have are more complex and usually wouldn't make sense as spammable skills, or would likely outright have to be pulled from the game if it turned out they ever could be spamm..
      

http://www.blizzblues.com/us/2-min-cooldowns-what-else-27813861477.html