@Adhamh As the game is not built around Mixed races traveling together at all, each race being mostly locked to their own planet, except for very very limited visits, it makes perfect sense to Guild-Race lock. They've pretty much said that Guilds will remain racially locked, and there isn't a reason to change that.
As has been said, you can be a member of 1 guild per planet, so there is nothing stopping you from making a related guild on each planet that has an alliance. It's not like you'll get much multi-racial use out of the alliance, afterall.
