The death penalty should be abolished; outside of war the state should not possess the legal ability to execute anybody. Reason being is the state screws up; just because the state can pass a law doesn't mean those it victimizes under said law deserve it. Homosexuality and cannabis are great examples of this dynamic. You cannot give back years taken, you can only make them very wealthy and cost taxpayers for continuing to elect unrepentant jailers.
None of these protections should apply to oath-taking elected office holders convicted of treason or other high crimes against the people. Other than for said oath takers: criminal punishment should be made optional, with the other option being expatriation from the nation with the punishment on pause in the event you return. The fact we have a system which acts to make the 'offender' actively miserable, rather than separate the 'offender' but otherwise treat them with dignity, shows we are still a very barbaric society in the West.