I am coming across far too many players who don't know how to use this feature, it might be worth having a tutorial for new players to show them how to use it:-

To look for a party
To look for a member

Consider adding a "!" or "?" or "*" icon above players heads similar to how 11 did it.

Consider revising/removing the Party menu search buttons so new players (and old) aren't confused with which system to use.

From what I gather 1.22 will see big changes to the LS menu and UI in general so this could be worked in at that point.