I liked the episode, I think the battle was well animated, moreso with Dogasu and Dustdas, and Homika had a really fun personality. Best thing about the episode: Iris. She got the biggest laugh out of me in this and her and Dent at the end where hilarious. She really was a fun character for once, she was reminiscent of her few good episodes in and after Raimon City where she was more jellin' with everyone and it was really nice to see. I hope it carries over in BW2. Also, I liked that we saw some personality from Kenhallow, some fighting spirit, something to make me care what happened to that Pokémon in the battle.
The one negative thing about the episode was that... it didn't feel like an eighth gym battle. I didn't have that "Wow, look how far Satoshi and his team have come" feeling, nor did I have that "I can't wait for the League" feeling. I didn't really connect with most of Satoshi's choices for this battle except Kenhallow, so I never really felt like rooting for them or that I really wanted them to win because they weren't really memorable as characters. The fact that Homika's Dogasu had more personality that Satoshi's roster combined worries me.