Of those who have posted they are dead set against a firing pin block, how many have experienced a problem with one? It is so far down the scale on factors to consider for reliability that it is a complete non-issue for me. Yet, I like those without a firing pin block ("Series 70"). Easier to completely strip and easier to get a superior trigger pull. As others have noted, safety is a non-issue with these with a titanium firing pin and heavier firing pin spring.
For me, the presence of a firing pin block will not stop me from buying a 1911 which I otherwise like even if I prefer those without.