I agree, but I don't think you can be disappointed from this ruling. Getting the government out of marriage is not an option for the court to take, and it wasn't the issue before them.
If we want government out of marriage, it'd have to be done through Congress and a reformed tax code.
Some states have started looking at dropping the formal recognition of marriage entirely. Increasingly devoid of any meaning, and given enough harassment for limiting who it applies to (consider, say, 12 people and a goat), comes a point where the state decides there is simply no point in recognizing the institution at all.
If we want government out of marriage, it'd have to be done through Congress and a reformed tax code.