Insurance companies will probably do the same thing banks and credit card companies did last year. Soon after Congress passed a law limiting interest rate hikes, credit card companies immediately sent out notices of increased interest rates to beat the implementation of the law. Health insurance companies will probably do the same thing.
Point 2... If anyone thinks outlawing pre-existing condition exclusions will not result in higher rates for everyone, I have a couple of Ohio River bridges I'd like to sell. Insurance companies will be forced to insure people AFTER they find out they are sick.
If I was a young twenty-something, I would pay my measly annual penalty for not having insurance, then buy insurance if I found out I had a serious illness. People have been doing the exact same thing with auto insurance for years.