Just saw the episode. It was pretty nice getting to see all the recurring characters interact but of course I was expecting more battles. It was worth it, so making this a four-parter was a good move.
I have a feeling that this running gag with Bianca pushing Ash into a river will either end in this saga with a) Ash steps aside and Bianca falls in, b) He accidentally pushes Bianca in himself while rushing to a league match, or c) He finally snaps and pushes her in. Either of those three will make me happy.
Quite honestly I wanted to see Ash wipe the floor with Carbernet, but he's Ash, so yeah. Palpitoad almost pulling a Krabby on us was pretty nice but like what a lot of people said, I was hoping for more personality from it.
* Credit to pokefan#493