This update makes a change to the squad/selection/match rules in-game. Each club from the nations included in this update (125) are restricted to use only players with the same nationality as theirs. Be it first or second nationality.
SpaceStash is an addon aiming to be an equivalent of Bagnon for Wildstar. Actually, it allows you to personalize some aspects like icon size and the number of items per row or the currency you are willing to display.