I am sure that new designs would be better on paper. I am also sure that a regulatory regime in which nuclear plants are allowed to be exactly as unsafe as fossil fuel power plants would somehow turn out in the real world of money and politics to actually be worse than fossil fuel plants.
I don't think we as humans know how to create a regulatory structure for nuclear that would keep away people who are willing to sacrifice principles for money, and at the same time allows new designs to easily be built.
I don't think we as humans know how to create a regulatory structure for nuclear that would keep away people who are willing to sacrifice principles for money, and at the same time allows new designs to easily be built.