I believe the change in pitch is the same as west, but I'm not sure. If so, its already in place and proven successful.All the talk about First class and no mention of reduced pitch in coach? The leg room is barely useable as it it unless you are 5'10" and under. This will make many more people miserable than removing some F seats. Now, not only will the FF not get the upgrade, but they will be shoehorned into a seat with their knees smashed.
Then, the pax in front will inevitablely recline the seat therby putting their heads mere inches from you face, further reducing the small space. Another row or two in coach will also have the benefit of making the race for overhead space that much more enjoyable.
IMO reducing pitch is a bad idea.