Uhhh, where to even begin with this?
1. The Dragon Balls were just used to revive Frieza so they can't be used for like another 130 days. Or a whole year. I can't remember which. I guess not a year because there was a six-month timeskip between the summoning of Shenron to learn about Super Saiyan God (though to be fair what the hell happened to the other two wishes then is beyond me) and his summoning to revive Frieza. Point being, they can't be used to revive Piccolo yet. I guess the Namekian Dragon Balls could be, but it ain't like anyone besides Goku knows Instant Transmission, and he's kinda busy at the moment!
2. Underwhelming, maybe, but poorly animated? I'd say it's slightly above-average animation. For an example of poor animation, go watch the new Berserk. It DOES indeed pale in comparison to the movies, though.
Y'all might be hating but I'm still enjoying it! And I'll probably be watching at 8 PM tonight.