Enjoyed Goh and Dawn's scenes but other than that, i found it rather underwhelming in terms of animation, battle choreography and score. Overall, i think Ash vs Cynthia had a stronger start. It seems like they were going for a more a realistic portrayal of Leon's strenght this time around, but at this point is kind of too late.
Usually, i'd appreciate all of the cameos, but not the way it was done here. The constant stagnant images of characters kind of messed up the pacing, they'd be better off focusing on the most important ones for Leon and Ash, instead of characters like Piers/Marnie/Allister, and doing it prior to the battle's start and after it ended instead of midway through.
That said, i do enjoy the idea of them not limiting themselves to one gimmick. It could have been a bit of a clusterf*ck had this been a normal fight, but since they have 3 more episodes for this battle ahead they can evenly spread them through each one of them. At least things will not get as stale.