Thanks to the use of a ton of still frames in the first half of the episode, good shading and lighting, and reusing frames, it looks like Dragon Ball Super actually had a pretty well animated fight for once. The transformation itself is much better looking than the generic Blue, and was actually kinda cool.
Goku likely instant transmission'd to someone with energy to utilize. If it's Frieza, that's a great callback to the Namek fight. If it's Gohan and Piccolo, that would make sense too.
Though this still doesn't hit the highs that DBZ did imo, this was the first episode I was actually invested in while watching.
I hope to see more good episodes like this, and it seems like Gohan/Piccolo/Vegeta may still yet have some interesting scenes themselves. I will legitimately be angry if they pull another "Piccolo takes the bullet for Gohan so Gohan gets a super power increase. Because as much as I am a fan of Gohan, the latest DBS movie seriously fumbled that trope, and really made a mess of it.