Common ground was a very nice episode about a pony trying to connect with the daughter of her girlfriend (the episode didn't clarify she's his daughter, so that's my take). I'm not a huge fan of the Buckball scene where they play a game and I thought Snips' first scene was too long. That said, I kinda like how Rainbow Dash tries to be a big friend of that little pegasus. And the moral was very nice.
She's all Yak is probably the first "meh" episode I watched in the season 6. This episode didn't need to exist. It's a pity, because the song is nice and I've seen some cool enhanced animated expressions that were unusual in these last seasons.
I wanted to see all that in a good original new story, not in a dancing episode.
And I'm 19 episodes to finish the whole show. Never thought I'd finish it soon, let alone finish it one day after my experience with season 6. xD