Loved Coulson coming clean to the team, and their reaction. Loved his discussion with J. August. Loved the wedding. So, yeah, all of the elements of the episode were great. The thing that tied it all together, however, was very weak. The whole 'fear dimension' thing made zero sense and was presented so poorly. At first I thought it was going to be a reason to revisit a lot of the hell the team had gone through...but a random Kree, Lash, and a pre-Deathlok Deathlok? And everything went down to a single shot? I think budget constraints killed what could have been a promising concept, and time constraints killed any depth. Of course, they didn't have the money to bring back their bigger stars, or to shoot a scene on Mavis, or have each character get confronted by their fear, but an episode designed to celebrate the series and they don't bring in Dalton? Really?
I can only assume (or hope) that they manage to bring him back for a bit of an arc later this season.