When we were initially deciding how Treasure Goblin health would scale with each level of Monster Power, we wanted to make sure that they could still stand a chance against your heroes and provide a reasonable challenge. We thought we scaled them pretty well, but after paying close attention to your feedback since 1.0.5 launched and doing our own testing, we agree that we may have set the bar too high. We're already looking at making some adjustments to tone down goblin health at higher MP levels, but we don't have any specifics to share at the moment.