I have yet to see this episode, but I'm looking forward to the interactions Langley has between the group as well as seeing some Magyo. As for Iris managing to brave her fear over Ice-types, uh.... that didn't really interest me. Don't get me wrong, it's great that she did, but I have never had any interest in Iris's Ice-type fear as it's not a fear which effects her in a serious way, she's just scared of them because the Dragon type has rubbed off on her. Iris could still become a Dragon Master while still having that fear and we know she's capable of battling Ice-type Pokémon when she has to.
It's got nothing to with Iris's character, it's just me preferring deeper development episodes with a flashback and such. That is why I loved the episode were Doryuzu starts obeying Iris again because it contained most of what I liked in a development episode- A flashback, an emotional scene, Iris learning from her mistakes, etc. Iris's fear of Ice-type Pokemon I always saw it as more like something done for entertainment (like Kasumi's fear of Bug-type Pokémon). So well done to Iris managing to conquer her fear, but I never found it an important part of her character.