I'd still like to hear a counter to what I displayed above, if possible.
I have always assumed that Old Kai thinking base will already be plenty whereas Goku thought they would need SSJ to get the job done as a flat out indicator that the fusion through the Potaras is simply more powerful. But what if this is all because in the fusion through the earrings Gohan wouldn't have to match his battle power to Gohan's one, whereas in a fusion Dance matching the battle powers accordingly would be a needed? The latter could be damning to a warrior as powerful as Gohan, as we aren't sure if the suppressed power simply re-appear once both are fused.
So, how would you guys counter this hypothetical counter argument someone could pull off?