Originally Posted by Sykes

Random tidbit that could have interesting implications: United's sales department is saying that the new Premium Economy booking classes are going to be O, A, and R. This is significantly different than Lufthansa (G, E, N) and ANA (G, E).

Possibly related is that ANA has started publishing R availability to Sabre (ordered in-between P and G). Sabre seems to be categorizing it as business class at the moment, but it's all 0'd out right now.

A makes a lot of sense, but it'll be interesting if using O and R implies any sort of policy change aside from a simple booking class realignment.