The whole Kaioshin segment needs to be rewritten.
Comments about Super Saiyan 2 Gohan at the Budokai should be amped up more. It's silly for them to try to make Kaioshin and Kibito look all that powerful. They should say something like, even the greatest of Gods cannot be that strong. Referring to South Kaioshin or something of that nature.
Kaioshin should mention that Badibi has very strong fighters, but they are no match for him and Kibito. Kibito can handle the light work more or less while Kaioshin has to use all of his might to defeat Badibi's magic. That's the gameplan. Kibito takes out the trash, Kaioshin deals with the powerful wizard. Surprise, surprise, Badibi has gotten the most powerful being in the known universe on his side. Now Kaioshin is sweating and he's sweating because of Dabura and Badibi, not Badibi's fighters. When he gets nervous, he's only nervous because his world is rattled and he's scared that the Saiyans will give up energy to Buu. He's never concerned that he cannot take out Badibi's fighters. Badibi doesn't expect Pocus to defeat Kaioshin and has Dabura out there making sure the matches go as needed. Kaioshin is terrified of Dabura.
Goku needs to clarify Gohan's apparent weakness. Sure, he's slacked off and lost power, but what's worse, he also cannot tap into his full rage power anymore. That's what makes Gohan special. His rage power essentially unlocks his current potential. When he was younger, he was able to get massive rage boosts because he was so untrained. Now that he's trained to the limit and has reached most of his potential, his rage boost puts him into 5th gear instead of 4th. Over the 7 years, although he's weakened, he has grown into a man, his potential is opened up even more and the gap between his trained power and full potential at the time widens. Enraged Teen Gohan is much stronger than Enraged Kid Gohan, even though Kid Gohan is actually more powerful without the rage boost.
Let's see what else there is while I'm on subject. I think that covers the Gohan issues. There's some other stuff with his relation to Fat Buu's various powers, but I can't recall.
Gotenks should get a minimal boost in power in the Rosat and just have the added forms. That's it. All that Base> Super nonsense is just that, nonsense. Slight boost for Gotenks, but it's really about him finding those forms. They are already stupidly powerful as Super Saiyans and they are unlikely to gain massive power in 6 days at this stage of the game.
And that's about it. I have Gohan at 10x stronger than Goku and my numbers look very fair and reasonable. I had to make some changes to the manga, but I think most would agree they are common sense changes.
Also, this is why Gohan is able to lose half his power and still kill Cell. Because his power is unique. If it was anyone else, they wouldn't have a chance. Goku urges Gohan to tap into that monster power one last time and he is able to rage his way back to his full power for just a second. Gohan gets a rage boost there and recovers his true power in totality.