The ranking points for each tourney are calculated on the strength of field, which is worked out from everyone's world ranking. In theory it sounds good that if all the players were to play in the same Asian tour events then it would bump up the field strength and points on offer. There are two problems though. The players rankings are all dropping week by week, so the field strength won't get the big boost they would hope. Second, they would have to be finishing in the top few spots for them to get any decent points.