Hit is also much stronger than SSBlue in the anime.
Nah in terms of raw power he was weaker. That's why Goku urged him to use the time skip which he did. His time skip allows him to fight against those much more powerful than himself but physically he's inferior to Super Saiyan Blue and would be considerably below Black.
Because he trained a bunch after killing the androids, then trained a bunch with Kaioshin which he specifically credits with making him much stronger than he otherwise would have been, and he's still weaker than Dabra.
And then after Dabura he powered up to the point he's comparable to SSJ2 Goku whose enormously more powerful than SSJ3 Gotenks.
Zamasu is tens of thousands of times more powerful than any of the previous Supreme Kai's for the same reason why Cabba was tens of thousands of times more powerful than any of the previous Saiyans, it's for the sake of the plot aswell.
Zamasu was a main villain and it called for him to fight against the current Goku but not get instantly stomped as that wouldn't be entertaining in any way.
Piccolo isn't God level but held up against Frost for an entire episode because him being tapped in the head and falling unconscious in seconds is something nobody would have wanted to see. That's not entertaining.
The manga does make more sense because he never absorbed the power of God but he did in the anime so they've had to boost everyone up so the story is still largely similar.