I didn't like this one much. Felt a lot more like the old movies, wheres Battle of Gods seemed to take itself less seriously, and focused more on the comedy side, which felt more contemporary with today. So did the new animation style and that they used an insert theme (from Flow). It was also a bit less cliche with the hero actually losing in the end for once.
If I was still a kid, I bet I would have liked Resurrection of F a lot more than Battle of Gods though.

the hero losing was my least favorite part of Battle of the Gods.  Hopefully Goku gets more powerful than everyone soon.  At least more powerful than Beerus

Not very likely to happen. Either way, I liked taking a look at the power readings here.

Goku SSG was supposedly a 6, Beerus is a 10, Whis a 15, according to Toriyama. So that's why Whis mentions Beerus had to use almost 70% of his full power to beat him. However, Golden Frieza beats even a SSGSS, and yet asks Beerus not to intervene, as he could still beat him. So SSGSS is no more than 50% above SSG, maybe an 8, maybe an 9, and Golden Frieza at full power is just above that, and comes just short of Beerus.

Yeah, I've read that interview. Though I wonder where the info that SSGSS is stronger than SSG came from? Was it mentioned in the second movie by someone? I can't recall.

I see. I'd like to see the Shounen article to see where it originated from. So I'll see if I can find it. As it can be misscommunication or missunderstandings. For example, Toriyama said that while Goku was (in his opinion) a 6 while fighting Beerus, he added that "Only, Saiyans rapidly increase in strength as they fight against strong opponents, so the longer they fought, the more that gap would shrink, and it might even be possible for them to eventually turn the tables."
So in other words, he thinks Goku could get the upper hand even in SSG form if they fight long enough.
So it's not neccisarily that the form of SSGSS has to be stronger than the SSJG form in order for Goku or Vegeta to now be stronger than 70% Beerus. It could also be the result of their training after the movie.
So I'd like to see what the original quote says exactly, and where it came from, since it wouldn't be unreasonable to think that a form achieved by one self could be a bit weaker than the one achieved with the energy of 5 other people. It reminds me a bit of how Goku and Vegeta refused to turn into Vejito again, even though they would be more powerful in that form, and instead fought Buu with their own strength.

Oh, now that you mention it, I remember the good old power levels. They screwed it badly around Frieza because the official power levels mean, besides the 50x super sayan multiplier, absurdly high 10-25x Zenkais for Goku and Vegeta after the Ginyu force, and a similar power level increase for Piccolo between Frieza and the Androids. And then Shonen/Toriyama went on to say "it was to show numbers don't matter" to try to fix it...

As for Vegetto, on this week's episode, after being beaten badly, Goku mentions he thinks even Vegetto couldn't beat Beerus. That's an interesting note, but it remains to be known if Goku is referring to the ascended SS Vegetto which beat Buu Gohan, or an hypotethical SS3 Vegetto. According to the charts I did once for my own amusement (hah) trying to fix the inconsistences since the Ginyu Force, SSJ3 Vegetto would be exactly 90% of Beerus.