Some classes have been simplified even further from their previous states. For example BM hunter no longer requires tracking Frenzy stacks and it's just a flat, boring DPS cooldown. The emphasis seems to be even further shifting from micromanaging your characters output to dealing with encounter mechanics (movement, adds, etc) as has been the trend for a while now. Personally I'm not a fan of this change to a more MOBA feel, but meh.
The specs known for being proc heavy, still are from what I tested. Fire mage and, Ele Shammy, Frost DK come to mind, although on DK you can often just ignore the procs and do "fine".