We will lose our CB (for our 1 DD) but we already knew we would regardless of how they decided to apply the new ruling. We are fortunate enough to have enough income to not need it, but I'm sure that's not how it is for a lot of people who earn just over £60k between their family.
I would have actually favoured them leaving it as it is where everyone gets CB but restricting it to 2 children and then reducing the tax allowance for those on over £100k to fund CB paid to people in that tax bracket (so sort of self-funding 2 x CB). That was until I remembered that Brown/Darling had already done away with the entire personal allowance for anyone on over £100k.
Maybe it should just have been left as it is, so everyone gets it, but limited to 2 children?