The Supreme Court in India has made execution a difficult option, with many layers of review. But that process in itself throws up umpteen questions.
My reasoning is simple: most often many questions are asked whether we have been able to conclusively prove the crime has been grave enough, whether it is the "rarest of the rare" to warrant death. Then there are also questions like: if A has been given death penalty, then what about B or C or D. Wasn't their crime also bad enough? Why haven't they got the death penalty? There are appeals and counter-appeals, and it goes on and on; which doesn't look good at all.