Yu-Gi-Oh! Arc-V Episode 23: Rune-Eyes Pendulum Dragon was awesome. Though he didn't need to summon Timegazer Magician to use Polymerization.
About the show in general so far, I was shocked when Yuya Pendulum Summoned for the first time. Being able to summon multiple monsters and have your Pendulum monsters go to the Extra Deck so you can summon them again, man, that's crazy.
Those two guys that keep appearing and Sora, they're all suspicious. Who exactly are they, what is their goal, and how does it relate to Yuya and that bracelet? Then there's Reiji/Declan and Leo Corp.
There is one thing that annoys me though. The idea that learning how to do a new summoning method is hard.