I am playing a repeater and I get used to it...
And I met a great crossbow with fusilade...oh wow thats another level
But consider that there are a fair number of players who use headphones for "chat" and better situational awareness.
Note: Many mobs can be heard before they can be seen. So headphones can be very helpful when reation time matters.
Anyways... Repeater volleys and cosmetic pets have for (last 10 years) made playing in groups a very painful and tedious experience for many. Asking people to run "quiet" really isn't a valid option, as either they're childishly entitled, or its not possible due their build choices. Granted, one "loud" person in the group / raid can be avoided by keeping some distance from them... but its not an absolute fix. All that being said, when most of the group is running "loud", I simply look for an excuse to leave. Thus saving myself from the migraine later on.
So yeah... I'd be all in favor of UI setting to mute combat, cosmetics and pet sounds from other players.