The way I understand it, now they have to form a trust to pass on their assets.
Maybe you're right. It isn't that big a deal to form a trust, I think.
The only thing that the civil law does not offer to homosexuals seeking legal partnerships with each other is state licenses, which is what this whole matter is about.
Civil contracts are much stronger than marriage "contracts", which do not obligate either party to do anything and do not permit damages for default.