30% performance hit? I'm sure that heavily depends on the workload... and I'm also sure you lose performance when HT is on, depending on the workload as well.
I disagree with you. The majority of users don't care about being behind a CG-NAT (what you call "crippling"), and CG-NAT offers a very big layer of protection that avoids problems like the one on this article.
This is not a problem if you are behind a CG-NAT. If you are not (that should be the default) then ask your ISP to put you behind one. If they don't offer that service, then it's time to shop around.
If that's your best shot better keep quiet.