It's also been my experience that you'll find more non-revers in DL's premium cabins than in CO's, especially on Hawaiian and European service. Those that have issues with empty trans-oceanic seats up-front (or worse --filled with non-revers) will probably have an issue there.
As a CO Platinum, I'm fine with this. And as someone who also has DL NRSA perks, I'm also fine with this