It's a bad idea to disable player search. It is needed to add people who are not on your friends list (which is capped at 200) to a Linkshell. I run a PS4 linkshell and not everyone is in the same zone where I can invite them to the Linkshell. I have to go by player name which is only available at search part of the time to add them. Player search needs to be refined, not disabled. Sometimes people think a feature is useless but haven't seen where it is needed.
/Tells are already restricted in this game, it just made RMT sellers increase the number of bots. Again, there are RMT farmbots at level 50, read back at least one page lol.