I'm surprised how much I like this arc. Arceus, while not the most bullsh*t Pokemon (that goes to Dialga and Palkia), tends to be portrayed as a "god" by people who don't read their Pokedex description - about Arceus having been worshiped as a god in the past, nothing more. Multitype, it's rarity and ridiculous strength make it a mistake people could easily make, but that doesn't make it a god in any way, because that would be just idiotic.
Anyway. This arc. I like it. Almost makes me like Arceus, such is a power of PokeSpe (Dialga and Palkia still suck though). All of the protagonists' actions backfired and Team Rocket once again proves there's no evil team in the Pokemon universe better than them (I like Plasma though). It looks like we can hope for Giovanni's glorious comeback too!
I wonder what names the protagonists will have when the X&Y arc starts...