I think it would help a lot to reward loyal users to have a few seconds of spotlight after sending a message so they do not get lost amid the chat spam in big channels.

If VIP user sends a message ALL chat messages pause for 5 seconds. Specially for mods... some kind of option to send a "Remarked Message" so maybe it has a 10s chat pause. That way certain information can come across during chat crazyness...
If Tier 3 Sub sends a message all chat messages pause for 3 seconds.
Even 1 second between messages would mean quite a lot for VIP and top donators to have a little bit of attention during streams. So people can actually read in that 1s the message and then get again all the spam.

Thanks a lot for the read and I hope it helps improve our chat system.

Kind regards, JoaK0