Saying "they get out of hand" is an empty, meaningless phrase that's just another way of saying "but where are the showings", and we all know that some verses that lean heavily on scaling despite showings is Pokémon. I think the Pokémon scaling is valid, despite it being messier than Dragon Ball. Any criticism would be some comic vine level ignorance about how obvious bull isn't obvious bull— making all Mons scale to each other because the most consistent showings are there— despite it being worthy of the ol' "Spider-Man will never scale to the Hulk" treatment.
I mention it because the multipliers here are of similar validity, if not are of a higher caliber than that in terms of validity. The Multipliers here are really solid and consistent, so ignoring them would be like ignoring scaling. It doesn't make any sense when the whole thing is true— Goku is stronger than what his previous use of the Kaioken would put him at. And since the Kaioken is a linear multiplier, we know how strong Goku is with that. Goku being stronger than that version of himself while using the Kaioken is fact. Scaling him to himself using the Kaioken when he is stronger than that version of himself in that state is the most rational thing since we decided a Ratata shouldn't be able to defeat Dialga, no matter what Pikachu vs Latios and normal Mons vs Arceus shows.
I already said that if we're going to forgo Multipliers that are SOLID as **** and consistent, we might as well do the same with powerscaling, since the main issue people gave with both of those examples is that it goes beyond their showings.
"But with Powerscaling, we're using feats to bring the characters higher!" And with Multipliers, as long as they are consistent, we know exactly how strong a character has gotten, instead of this vague "higher" stuff that would require us to use the Multipliers anyway in a debate, because saying Namek Saga Goku is equal to his previous arc version is blatantly false. So much so to the point that having profiles or keys for those arcs is pointless, considering it requires a Q&A thread to explain "how much higher" they are. Then, we would give them this information.
And I think that being consistent with showings being all important is bullshit for every verse. The 4 pillars of judging a character's stats are Scaling, Feats, Consistency, and Multipliers. Not every single one of these has to be really strong, but like any good argument, there's a requirement for at least some of these to be really strong in order for it to pass.
Dragon Ball's Kaioken Multipliers are hard and consistent, and while it's lacking for the feats to support the boosts from the multipliers, the in verse explanation for the lack of feats for literally everything in the story applies here, just as much as anywhere else. We don't ignore the idea that Goku and Frieza are Dwarf Star Level because Frieza fails to blow up Namek— we don't say Goku is only hypersonic because it took him far less time to fly down snake way than it should.
Obvious PIS is obvious PIS (and I know obvious shit isn't obvious to everyone, but don't get me started on how everything is subjective and therefore conversation is dumb, so let's just do like how humans do in life and pretend that the standards we have for shit is obvious and objective, despite them being the opposite of everything).
The same logic goes with Showings. By refusing to put the data on the Profiles, we are essentially saying that we don't believe Goku is where he really is in power. We're saying that it's doubtful that Goku isn't at least 10x stronger than his Base after fighting Ginyu, despite knowing 110% that Goku wouldn't be able to fight Second Form Frieza even with the 10x boost, and since we know how to increase his actual stats we have by the Kaioken, it's only rational to substitute all the information that is explicitly true.
Point is, it doesn't matter if there's no explicit showings. Everything about this scaling is 100% based in fact. There is no disputing its validity beyond the unreasonable doubt of looking at it and saying "what about feats?! I'm not comfortable rating a character who I know in a quantifiable manner is stronger than his previous showings without the story slapping me on the head with feats that confirms what the basic math the story gave me said!" And dying of an anxiety attack.
Wasn't Cal someone who said that they dislike how people try to ignore clear evidence and refuse to think about the story in favor of being blatantly shown instead of told? Of course, I know that's me paraphrasing, but Cal did say that.