Keystones other than Maw or DhT need to made more attractive

Everyone is mostly looking for those dungeon and i completely get why. They are fast and easy compared to others, like Arcway or Halls of Valor. I don't like the fact that the reward you get for a 3 boss dungeon is the same as you get for a 5 boss dungeon. The timer is so tight that one mess up can cost you your run (obviously unless you outgear your keystone) and there are so many more ways you can mess up in Archway than in Maw.A way to fix that imbalance would be to offer one potential chest per boss. I get that blizzard wants to keep the system simple. But that simplicity came in the cost of imbalance.