There are three types of hunter trapping strategies that pertain to this discussion. They are:
Chain Trapping: Our hunter friend drops a trap, plinks away at a mob to pull him into the trap and then runs back to drop a second trap for when the first one breaks. This strategy is excellent for keeping one mob controlled.
Double Trapping: This same hunter drops his first trap and lures a monster into it. He then drops a second trap before the first breaks and draws a second mob into it, thus controlling two mobs at once.
Triple Trapping: Now, if our hunter friend has taken certain Survival talents, he can also drop a third trap along with the first two to control three monsters at the same time.
Chain trapping is still a viable hunter strategy even after the patch. Double and Triple trapping, however, have gone the way of parachute pants and the dodo bird. Many of us will miss the hunter's ability to control multiple mobs at once in an instance (I'm leaving kiting out of this because we're talking traps here), but I suppose the real issue was how multiple trapping was being used in PvP. In any case, now that it is gone, is the hunter class more balanced, or have they been dealt a blow that will take them a while to recover from?