First of all I would question your supposition about easy raids in china but we'll table that for a second. If EASY raids will bring back a significant portion of the western player base (and I'm not saying they will) and the disparity between east and west was like 51% to 49% than easy raids become worth it. Honestly if the difference was one player between china and the US/EU and they called that the most then really it makes total sense to provide some easier content for that 49% who left.