Is it possible that the SSJ forms were useless at EOZ?

[Hector]

In continuation to PLG's points about EOZ Base Saiyans >= Mister Buu, and without taking Dragon Ball Super into consideration...

Is it possible that at the end of the series the Saiyans had found a way of relegating the power of their SSJ forms, at least partly, to their base? Maybe when Goku saw Ultimate Gohan, he realized he could train his body to contain his full power without needing to strain himself with transformations. I think that makes more sense than assuming he just became 500x+ stronger during that period.

 

[Power Level Guy]

That's the thing, we have no idea how Goku has acquired such power, but he has. Goku has acquired power enough to be the strongest in the universe. GT continues this idea.

I think that makes more sense than assuming he just became 500x+ stronger during that period.

Goku is stated to be the strongest in the universe by EML.