The estate tax mainly hits the wealthy, and is therefore the kind of progressive tax I usually support (as opposed to the sales tax, which is regressive). That being said, the threshold seems a little low and should probably be bumped up to at least $1 million.
The difference between $675K and $1MM is not that meaningful, especially in a state where housing prices push a lot of homeowners over the threshold. The federal threshold is over $10MM. NJ should ideally match the Federal threshold. Or at least $5MM.