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Unlock Companies
Being a player that likes to play all aspects of the games i've joined and completed all the companies in Uldah, grindinia, and La nosca. I dont especially enjoy joining/unjoining to various companies just to get specific items.
Frankly, the only reason for companiess were the pvp part of the games to game "bragging rights". Now that SquareEnix have already unlocked joining pvp in a "free state" just to fill slots, the last reason to keep companies lock have disappeared. Players, also be allowed to buy houses and join free companies of any group or town.
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Free Companies are player made guilds.
Grand Companies are the organizations linked to each city state.
You can already buy a house in any housing zone regardless of which Grand Company you belong too. You are only limited in that you can only own one personal house, one apartment, and one Free Company house per character. You can already be a member of a Free Company associated with any Grand Company even if you belong to a different Grand Company. You are only limited to being a member of one Free Company at a time.
Grand Company restrictions seem to only exist for flavour at this point by granting you access to city specific glamours, bardings, PVP warhorse, ect.