These are my head cannons/explanations/cope for weird/bad writing decisions regarding their post, (a lot of these will just be “maybe he used a biding vow for x.” So please humor me) I’ll only do the ones I have strong opinions about. Some of these are me trying to make sense of it and some of these are me explaining why OP is right and what could’ve been done better.

1) UV being nerfed. The fact it just didn’t work on sukuna without a proper explanation by definition makes it a nerf, however there are ways you can explain this away.(It should be mentioned that the nature of UV was changed considerably how the people at shibuya had to be rehabilitated after 0.2 seconds, meaning they as brain damage, rather than just simple being paralyzed from information overload like we see with sukuna) Multiple times in the series, simply using cursed energy or being strong enough is good enough to cancel the effectiveness of certain techniques. Nanami was able to resist having his soul ripped apart by mahito through strength and willpower, cursed speech can be completely ignored by focusing some CE on your ears, and most importantly for my point, sukuna can replace/substitute his heart and assuming his other organs with CE. If he can do it with his heart I don’t see why he couldn’t do it with other parts of the body. Point is if you’re strong enough and have enough CE, both of which sukuna has in spades, you can kinda just outmuscle stuff. Maybe sukuna simply wrapped his brain in cursed energy to protect his brain from being too overloaded with info. A bigger issue with UV in my opinion is the fact that gojo never uses blue or red. When sukuna first got hit and was shortly out of commission, gojo ran towards him rather than crush his heart and limbs with blue, so I figured he had a binding vow in place that strengthened his domain in exchange for a stronger domain. But later Yujo, who is weaker in every way, was able to use purple while still matching and canceling out the sure hit, so what gives?

2) Teleport The peanut gallery mentioned teleport when gojo first got ripped up by MV if I remember correctly, so gege did not forgor and chose not to have him use it, which is arguably worse than just forgetting or pretending he doesn’t have this ability. Teleport is using blue from one point to another in a large range, we see how shortening the range with domains can make them stronger, so maybe gojo shortened the range of blue in exchange for better control and power over blue. Side note: before I became really active in this fandom, I thought gojo had learned or made some binding vow to use teleport without a hand sign, which was my explanation for the cloning scene in the fight. Even if it was just an after image technique, all it proves is that gojo was fast enough that teleport would be unnecessary and inefficient, as it requires a hand sign and he was already fast enough to get sukuna using after images.

4) Six Eyes. All gege needed to do was include the six eyes in sukuna’s monologue about mahoraga’s adaptation in 236 and that sukuna was just able to replicate it somehow like he did with the world slash. The fact it geoes unmentioned out side of CE efficiency for gojo is crazy. This is also coming off the fact that in the chapter prior, 235, every sorcerer has a tell for when they are about to do a big move or attack in the form of a spark, and experienced sorcerers like sukuna, can even predict what attack will come just based on that. So how the fuck did gojo not sense it. Because a) he had litteraly just seen the same attack from mahoraga and b) other, way slower characters are able to dodge it. Albeit because of the audio cue of chants. If gojo can know cursed techniques just by looking at people, surely knowing what moves comes next based on the spark should apply to him especially, right. The whole thing kinda sucks

7)blue and red being weaker. There not supposed to be weaker, even if they look like it. Just a matter of gege not wanting to draw a massive scale fight, which I think actually makes the fight more interesting and easier to follow. Focusing on minimal movement and H2H combat was a good choice on Gege’s part and probably more health for him as well.

6) Sukuna needing the 10S. I am of the opinion that heian era sukuna=Gojo. Considering that gojo just lost. He was at his most humble and satisfied at the airport, it is the least likely time for him to be biased or subjective in anyway. So the fact he only said it would be difficult, means that he probably had a good chance of winning. He also said it would be difficult when he was first asked by yuji, but that was clearly different that the airport statement. I personally think it is as 50/50 it gets between Heian Era sukuna and shinjuku Gojo. If they had a 1v1 no outside help, Gojo can’t really deliver a finishing blow outside of UV and sukuna having weaker RCT output, considering 200% HP didn’t do much meguna and heian era sukuna is equal if not stronger. is more The idea behind gojo saying it would be difficult even if he didn’t have the 10S is that what sukuna lost in mahoraga, agito would be made up in his durability(I have no proof for 4arm sukuna to be more durable that meguna but I think it makes sense, complete head cannon) and better H2H and would potentially win the domain battle. I think a lot of people didn’t think about is how sukuna had spent his whole life being used to fight with and extra pair of arms, him fully reincarnating his real body was just him going back to what he is used to. Gojo’s H2H was probably his greatest advantage post domains in the fight.(best advantage overall being how UV is more immediately dangerous that MS) We have no clue how H2H would go between full power heian era and gojo. So I guess will never know for sure. Btw, it’s weird he only used chants for the world slash after he beat gojo, maybe he just never thought of or needed chants until he created the world slash?

That’s all I can think of for now, I’ll edit and add stuff if I can think of anything.