[Suggestion] Union Party Option For All Players

I always use union party
but invite & accept list are not useful to me because there are so much character and they are changing constantly
it is also uncertain who will be party leader in party area

it would be perfect if there was such an option,

Accept union party from everyone at training area

Invite all union party at training area

What is Union Party?

Players who enter into a union party will receive a special bonus EXP buff as high as 25% for a full union of four groups.

Thank you.