I think the OP might have a couple of misconceptions about what the playtest was all about. It was not used, primarily, to fine tune and tweak the balance of specific features such as the moon druid level two shape change; it was far too unwieldy and course grained for that. The play test was primarily used to establish overall trends for what type of game and general mechanics that D&D players liked, disliked and preferred. They floated some specific 'trial balloons' on certain features and classes to see how the public would respond, some of it intentionally out of balance. I believe the internal playtest was used more to calibrate specific features and math, the public one was about 'feel'.