Gateway Bandwidth Optimizations

[Grosse-pasteque]

Lately I've experienced some waste of bandwidth (even considering compression) through receiving messages from guilds/channels marked as muted and it can become very intense if those guilds have a lot of members hence a lot of messages being sent and received so I was thinking why isn't there something to like prevent discord gateway to send messages of muted channels considering that it could be beneficial for clients and servers.
For example it could be implemented as /channels/{channel.id}/mute
Some more factors need to be taken into account like how the channel was muted (all/here/everyone/mentions/roles/...) but it doesn't seem that hard to implement server side so I wonder why they haven't done it already.
Thanks!