I really don't think another amendment would matter!
Why don't we pass a Constitutional Amendment that says that the government should be restrained by the existing Constitution??
we don't need to pass an amendment to protect marriage. We need to pass an amendment to protect society from individual out of control judges legislating from the bench. We need a Constitutional amendment with the equivelant of the California ballot initiative provision. Any court ruling (or new law from some looney legislative trickery) on a controversial issue can be put to a vote in the next election if enough valid signatures are gathered. And the citzen's vote will be the final word on the topic.
We need to return power to the CITZENS and take it away from our would be masters. Now understand, this is dangerous. It means that the majority can be tyranical if the right demagog comes along. It's happened before. We will inevitably go too far in this type of movement. But that's the nature of the ebb and flow of events. If the pendulum only swings one way there is no movement. The mechanism merely freezes in place.