Wasn't death a requirement for us to reach this current stage of human evolution? I don't think it is a good idea to stop it entirely.
Not sure about death being required. It's more that life after reproductive success is not required.
Curing aging doesn't stop death entirely. There's still the attrition of living in the physical world. Some portion of the population will trip and break their necks every year.
Evolution of humans by natural selection is already over with - or at least proceeding at time scales irrelevant to our civilization.