I didn't need the RCC to tell me that the Death Penalty is problematic. I can do just fine opposing it on grounds of economic and racial bias in it's application, as well as the proven use of it against innocent people.
The pope's herp derpery about the 'sanctity of life' is really just part and parcel of aligning with their position on abortion. They seem to understand the concept of cognitive dissonance, that the pro-life (anti abortion), pro-death-penalty right wing doesn't seem to see.
So yeah. Great and all, but i'm not really impressed that the RCC is speaking out about it, on this one issue, with a weak argument, while with their other hand they move against family planning, death with dignity, access to contraceptives, hell they LED the charge in court against the ACA over the birth control mandate. (And won) Spending millions on, and supporting anti-same-sex-marriage efforts. The Mormons caught a lot of flack in California over Prop-8, but the Catholics were right there with them, second largest donor, largest voting bloc. (I'd argue the votes were more important than the donations.)
I'd also like to know, given this supposed special relationship between the Abrahamic god and this one church, that somehow the 'don't execute people' thing wasn't communicated earlier, with all that other 'revealed truth' they supposedly got.