I wouldn't force anyone to do anything they didn't want to do, Trisher. The choice between to marry or not to marry is just that - a choice.
I don't disagree with you about CPs offering an alternative, but personally I think that either it should be available to all couples regardless of sexual orientation (even including, possibly, platonic relationships where life and home are very much a long-term shared thing), or done away with completely now that homosexuals now have the right to marry if they wish to do so.
That's just my view, obviously, and I accept that not everyone will agree with me 