Multiple pinned messages
I'd love to see an ability to pin multiple chat messages as sometimes there are a few relevant things going on. In some cases it requires a bit too much to put in one message which makes it harder to pin the relevant stuff, which either requires a sacrifice of what to pin and what to mention regularly or to flip back and forth between what to have pinned, neither of which is optimal.
My idea is that with pinning multiple messages you'd be able to choose a priority of it too so the viewer could either flip between the message to see and highest priority displays first or to also add the option for the messages to frequently flip automatically (with an option for viewers to make flipping pinned messages manual for themselves).