No more overkill than Goku using Super Saiyan God Super Saiyan to waste a weakened final form Freeza.
Yes it is because that one wasn't overkill. Vegeta being dozens of times stronger than Frost is overkill. There was never any need for him to transform in that instance unlike your example.
Vegeta in his freaking base form deflected a blast from Golden Freeza and Goku in his base form made a complete fool of final form Freeza without really trying. To say that Goku needed his full power to kill final form Freeza after he's worn and beating is just outstanding.
Vegeta deflected a tiny generic Ki blast intended to kill a fly like Krillin, there's nothing impressive about that. Goku stomping Frieza doesn't account for Frieza's durability. As weak as he appeared he still survived Earth's explosion. You saw Goku's Kamehameha do insignificant damage to Frieza even when combined with Freeza's blast.
I don't know why you'd assume the same Kamehameha would just wipe Frieza out weakened or not especially after what happened during the Frieza saga.
Unless you have seen the outline, that is just you guessing and assuming things.
Of course. I've only ever said a retcon was a possibility. Guessing and assuming is pretty much all anyone is able to do with this shows power scale.
And you're telling me that Super Saiyan 2 Vegeta beating up Super Saiyan 1/2 Black makes perfect sense when base Black beat the shit out of Super Saiyan 2 Trunks who is as strong as Super Saiyan 3 Goku? Or how the hell did Trunks even get this mutated Super Saiyan 2 form other than, 'I trained for it'.
I wasn't talking about specifics. Just in general. It's hard to swallow a lot what happened in the Universe 6 saga when you're supposed to believe they're all either as strong or dozens of times stronger than Super Saiyan God.
Base Goku being as strong as Super Saiyan God but then the multipliers still apply so he'd be hundreds or even thousands of times stronger than God depending on his form but Beerus is still stronger which then makes the Battle of Gods saga a weird mess.
Trunks being comparable to Goku which would make him dozens of times stronger than God and other things. It just doesn't make sense.
Them all being much weaker than Super Saiyan God as was presented in the manga makes far more sense.
And that an assumption that Goku didn't absorbed god ki in the manga based completely on him transforming into a Super Saiyan God, something he did in Battle of Gods after he took godhood into his being.
A scene that was actually corrected for the anime where Goku didn't transform into Super Saiyan God a second time. It's an assumption based on the scene where it was explained that he'd absorbed that power being completely omitted in the manga and then yes he still transforms into it in the manga.
Toriyama said he absorbed the power so wouldn't need to transform into it anymore. Surely why the form never appeared again in the anime because he did absorb it. So if he did use it in the manga then it's because he didn't absorb it and like I said they never said he did.