I've known Gurochan since 2008. Enough to know who ero and q was. From .net to .cx.
Since then, the site did changed. Not for the the best but not as worse as people think.
That being said, a lot things happened since. So I'll try to be as concise as possible:
* Spam DID became more frequent, but is somewhat mitigated by more user posts.
* The overall art quality of stuff posted here is way lower:
* Better artists no longer post their art here because they now have Patreon, Pixiv (and the likes) to monetize their stuff, leaving the lesser good art being posted. This also contributed to the ridiculous amount of re-posted images.
* If quality artists DO post here, its mostly to promote their Patreon/Pixiv account. Again, that's not bad as it is, but I'd like them to do like what artists like Veiled616 does and post complete content once in a while, and give people a reason the strive for more content.
* Various long period of shut down forced gurochan's demographic to change. Since a lot of user think each times that the site is dead for good. With them were some pretty good posters. Some of these shut down even had a change of admin(s).
* Old gurochan was more crude than the current gurochan. Being less known implied that user most invested in guro would pull more effort to find a site that match what they like. In its first forms, gurochan was almost purely about gore and violence, but was shortly split into /g/, /f/ and /s/, then /lit/ and /rp/.
* To this day, the most gruesome, grotesque, bold and violent arts I've still date to that time.
* Now, gurochan has spread to other topic through newer boards. After years of "debates", /f/ and then /3dcg/ became official boards of their own.
* Along with this diversification, it became somewhat more difficult to find original content, because tamer stuff tends to be more accessible to most user and overlap more among themselves. Which leads us to the next more contentious point.
* Loli and pedophilia content were mostly either implicitly assumed (e.g. "questionable age"). Although the former was a thing since the beginning, with the chibbi art style, it was able to "slip in the cracks" and be "tolerated". The latter, however, is rather of a "new" thing:
* Pedophilia on gurochan became overtly assumed as such when /3dcg/ became a thing, with its "accurate" children models. Some may say it is still ambiguous as "adult can look like children", but with the clear age range of some models, they are only convincing themselves.
* Nonetheless, this site that was formerly know only for its crude guro content, is now known as a website for pedophilia content as much as it is for guro content. We know this may be inaccurate but that's not what the rest of the web thinks of this site.
* As a result, it became somewhat more uncomfortable to browse and post content on a "pedo site", and artists were even blackmailed because of that. Instead, they choose to continue posting on sites like Dolcettish, Hentai-Foundry, The Dark Spot or even Pixiv, and avoid gurochan altogether. (there was Sexy Amazon, but its gone now)
* Curiously, on /lit/, you can now find things solely about pedophilia without any guro element at all in them, while literature only about sex were always frowned upon for being something that could be posted elsewhere. Just as if pedophilia only content not being postable elsewhere justifies it a place among guro content and in a site that says it is about guro content.
* As you may guess, I personally don't like lolis and pedophilia content at all. And I'd severely advise the admin to not delve into that road. Otherwise, this could lead to more serious legal issue that the site, admins and users won't be able to avoid like they did many times before. That being said, I still "tolerate" that kind of content, since gurochan is still one of the best site to find the kind of guro content I was looking for since 2008. (although Pixiv is getting way better than gurochan right now)
"Live and let live", as they say. That's also the only thing that has been a constant motto, I'd say, of gurochan since it's inception, and how it was handled since.
(tl:dr;) Gurochan may have changed since its first days, but I don't think that alone is a reason for it to die.