wait a fucking minute
the weakness of ss3 is that it constantly bleeds ki
the weakness of ss berserk is that it constantly accumulates ki and needs to be frequently vented.
so if you combined those forms, the downsides would cancel each other out. you'd achieve an equilibrium between the ki building up and the ki flowing out.
That will be the 'true' ss3, retconning what Goku and Gotenks used as an incomplete transformation.
They're gonna do it, guys. they're gonna fix ss3 then teach everyone else how to do it