I find the whole Premium C/J concept curious.

Back with the first gen flat to the floor business seats, like BA's 2-4-2 Club World and the current Lufthansa product, some business seats were definitely more equal than others. Now as more and more are getting all aisle access, I don't think there's as much spread between a 'good' seat and a 'bad' seat as they're a lot more homogenous.

Why would you potentially sacrifice the revenue of an entire extra seat (or several) for a small number of premium seats, but making the overall cabin layout less dense, and less efficient? If you look at Economy Plus/Comfort on United and Delta, they have extra booking classes here. How are you going to price and sell it? The revenue management of essentially a fifth class, is going to be complex. Plus overall, I think it cheapens the 'regular' business class cabin.