I find it really comical when people ***** about the estate tax, or the death tax. Almost all the time, these people complaining would never be subject to the damn tax to start with. Sure, $750,000 seems like a pretty low exemption level, especially considering real estate price inflation.
But here is the thing. The estate tax is the only tax that is completely voluntary. You don't want to pay it, don't leave all your property to your kids. Donate it to charity, create a foundation. And if you are insistent on leaving it all to your kids, then just purchase a second-to-die life insurance policy, cover the tax for pennies on the dollar.