One has to wonder about some of their decisions. Why not add a 'Main Cabin Extra' aka. Domestic "Premium Economy" with the extra space instead of cramming in yet more people. When booking a flight for my holiday at the end of the year on AA the first thing myself and the travelling companion did was pay the extra for the 'Main Cabin Extra' product. Cheaper than business but the extra leg room, without having sampled the product i must admit, would appear to be well worth the extra $$. Such an initiative would seemingly be a way for an airline to be distinguished from cheap and nasty "budget" airlines. If others have done it surely it would suggest the economics of it can be made work.
So little imagination and customer focus in that press release. Might as well just put a star on the tail and be done with it :|