The Expert grouping system on Japans servers is fundamentally flawed and broken in its design, encouraging elitism instead of helping players find other players who meet their specific expectations.
FFXIV has a far, FAR better tool for grouping, known simply as party finder. this easy tool allows ANY player to set their own expectations for forming their own groups. Is some elitist idiot expecting ridiculous things? leave him to wait forever for anyone to join, and form your own, more realistic group.
Copy the FFXIV party finder as best you can, do not repeat the mistake of expert grouping.