Increase the number of messages before muting inside instances

As I understand it, limiting the number of messages sent in a short period of time is needed to avoid server over-load and spam.
People understand and appreciate it, but me and many others have faced situations where we'd really appreciate a bump in the number of messages one can send quickly when raiding (thus, inside an instance). That's because we sometimes would want to be able to spam a little bit more in /say and /yell with some macros and/or addons.
For example: we tried to create a WA for announcing in /yell the countdown of the explosion of an ooze in the Rotface encounter. But we get muted if we do so. Many other examples, as you can imagine, share the same problematic.

Thanks.

Or, one solution you can apply yourself is changing the /yell to the /rw.

I'm not RL. And sometimes is more useful to have it in /say because only affects the people around you.