This season feels a little drawn out, a lot of the action and progression felt well over the top and though it's unrealistic it also crossed into being unbelievable. It's an overall nice conclusion but everything finished they way anyone would expect of a PG series and because of that predictability wasn't that interesting to watch. The epilogue was cute but too short would have loved to see how the relationships developed, but i guess that's not what this series was primarily about.
This series is meant to answer all the questions, any remaining unanswered question that you might have had about the characters or the world everything is bundled into this series.