When @Chat was introduced, I was concerned that it would suck. I gave Heyuri a chance and didn't want to shit on mod's effort to port a new functionality to site. But right now, I just think Heyuri would be better off if @Chat were gone...

Secrecy
I would've liked to know WTF happened with bobo the chimpanzee but that was only shared in @Chat (albeit for understandable reasons i reckon), not even in the wiki. There was a Valentines card made by Angel in the homepage, but I have no idea of where it came from, so I'm assuming @Chat. It's like Heyuri has a backstage, which definitively wasn't like that before.
Everything during Bunkasai2023 was made publicly with no problem.

Separating users
I believe there's a group of friends which formed around the concepts: namefag-@Chat-CGI. And the group doesn't mix with the other users, but I think they could.
Someone who doesn't spend their time glued in front of a chatroom to follow what happened yesterday between 2 namefags, has no chance to understand what's being said most of the time in @Chat, and will be left behind. A big chunk of the wiki is undecipherable to most of the users, see what I'm talking about?
In the other hand, I feel some of the namefags barely even use the boards... (unless they've been all posting anonymously without me noticing, in which case... good job! )

Bulletin > chat
Liek >>66295-san said, @Chat has become Heyuri's de facto cultural hub, but it does a terrible job at it. Interesting info is drowned in hundreds of messages of namefags fooling around, which is funny but I can't read lines and lines of backlog, and everything past 200 messages gets baleted anyway. The discussion is moar organized with boards.
Also what's nice with bulletins is that anyone can join at anytime, while if ur 1 hour late in a real-time chat, the discussion is already over. Sometimes you'll ask questions to namefags and they'll never answer you because they don't know you. You're sure to have a discussion with all Heyuri users if you post in the boards, and not with the 10 people currently online in a chatroom. Interesting discussion should be moved to Off-Topic, Lounge and Strange World, @Chat is basically redundant.

Siphoning activity
We have moar users but Lounge, and maybe Strange World, are way less active than before. It's a shame, the spirit there is different from any chatroom.

Private OC
The OP picture and many others were posted in the chat but never outside of it. kaguya told them to also post in the boards at first, but he's given up now. It frustrates me to associate such a WINful picture with my negative message, so I implore the OC makers to at least release the OC they posted there, on /b/ and /o/ for example. That way it can be archived, and enjoyed by everyone!

Le Drama
Hopefully not that true in here, but I see sometimes namefags getting irritated at each others for personal reasons(?) Doesn't bother me since it's not my business, but it feels wrong to see Heyuri used for SRS BUSINESS.

I've seen 4chin projects with a shitcord server and they suffered the exact same symptoms. I don't absolutely want mods to pull back something they've worked on and the namefags to stop having fun, but yknow... at least some discussion about it.
I'm saying all of this because Heyuri has definitively changed and I feel a bit disconnected from it now.