I think Yuuji getting through to Megumi and finding out he has no will to live anymore would've been more impactful if we saw more of him during his possession than the three panels stretched over nearly 40 chapters where he's always just lying on the floor crying.

We initially get input that he's trying to fight back against Sukuna after he was hit with Jacob's Ladder, but then he's essentially just a footnote. "Btw, Megumi is somewhere in there and he's suffering." But we don't really see it.

I think it all comes down that the moment that really broke him, the Yorozu vs Sukuna fight should've given him more focus and Tsumiki. If that moment really hit and we saw him give up, his lack of presence for the rest of the chapters wouldn't be such a big problem.

The Yorozu fight was really just focused on her and Sukuna and their history. You get a mention that Sukuna is doing this to break Megumi and oh no, Tsumiki would die too, but really it's about Yorozu's character and Sukuna learning to handle 10 Shadows. Everything is about them, their jokes and then as a last addition we get "oh yeah, Megumi is sad because someone who has his sister's face died". Everything is already over at that point there is no tension, we don't feel with Megumi because the focus is on other people who vaguely look like him and Tsumiki. Looks are the only real connection to the sibling drama here and I think Yorozu and Sukuna don't even look that much like them. That should've been better balanced.

Take Yuuji's breakdown in Shibuya for example. That makes him want to die as well and throw everything away. We're there with him, how he goes through briefly raised hopes to crushing defeat, how his face distorts as he sees Nanami and Nobara die before him. He's going through anger, fighting with grit teeth for as long as he can until he just curls in on himself and wants to die like his friends. We hear his thoughts, we can emphasize with what is happening. Even when he finds out what happened while Sukuna took over, we see the memories swarm his mind, he desperately clutches his head, claws at the ground, throws up. It's utterly heartbreaking. And that is because we experience it with Yuuji. We don't just cut to him lying on the floor unresponsive and that's the only feedback we get to his emotional state, not even some thoughts.

Megumi clearly saw or felt what happened while Sukuna was in control of his body (I mean, if we didn't have the editor comment like in the volume release you could also think the Bath just numbed him, but I'm not gonna be that picky here). So show him struggle during the fight against Yorozu aka the body of Tsumiki. Show his reaction to being rendered mute and powerless, unable to even lift a finger to hinder Sukuna. Show me his thoughts, he clearly has them. Show me how he eventually came to just give up and wait for death. Just something, anything. All of this I mentioned I am just inferring, we don't get to go through his emotional journey that is clearly very important to the story. All we see is the aftermath with no additional context and then nothing for another 20 chapters or so.

For that matter, show me Tsumiki, if there's anything left of her at all. That is who Megumi tries to fight for after all and she's a victim in all this too. She might've gone through the same things Megumi did, she might've experienced similar pain, but we simply don't know. What would Megumi even be fighting for? Was Tsumiki just dead or gone ever since Yorozu woke up in the hospital or did she witness what was going on as well? Was the Yorozu fight just pointless in that regard because clearly Tsumiki was long gone anyway and Sukuna is essentially just burying a dead body? This fight could've actually been quite dramatic. It claimed to be that due to Megumi and potentially Tsumiki suffering in the background, but it was in the end completely inconsequential. Sukuna and Yorozu would've fought anyway, if Megumi and Tsumiki were there or not, and Yorozu would've always lost. Since except for some throwaway lines and the end panel there isn't really any acknowledgement of the emotional stakes, they fall completely flat. It's about Yorozu and her understanding of love and also a bit about Sukuna's backstory and all this is nice and interesting, I certainly enjoyed it, but this should've laid the groundwork for what is happening to possessed-Megumi as well.

Same with the Gojo fight. Was Megumi effected at all by seeing Gojo there, was he affected by what Gojo said, his disregard for Megumi's body that made Yuuji and Hana question if he even cared? Did he feel anything when Gojo died? Was he still capable of sensing what was going on outside at all or did he sleep through all that. For that matter, how did those 5 Unlimited Voids affect him? His brain should be toast by all accounts. Did he blame Gojo for anything? This could've added some much needed emotional stakes and depth to the Gojo vs Sukuna fight, but again, we don't see anything, just a repeat shot of Megumi crying on the floor.

Megumi went through some pretty significant character development and I assume that is going to go even further now that Yuuji has made contact, but that all happened off-screen. Especially "Tsumiki's" death and its impact should've been shown to lay the groundwork for what happens now. All we got so far is: what happened made him sad. Like yeah sure, I can imagine, but can't we get more than that? That's like skipping the majority of Shibuya except for Nanami and Nobara's deaths and then going right to Yuuji lying on the floor and Todo giving his inspirational speech without showing us even a hint of all the struggle and emotional turmoil Yuuji experienced in the meantime.

I'm not even a Megumi fan, it's just something I noticed while reading. Honestly, the last 30 chapters or so I pretty much forgot about Megumi. Yes, I want Yuuji to save him, but as for Megumi himself my thoughts were always just "well, I guess he's doing badly, who knows". It was all very abstract and hypothetical when it didn't need to be.