If Expert games were only played infrequently, this would not be a problem. Expert games should be special events that happen infrequently and are highly anticipated, similarly to Big games now. This would lead more expert players to play in Standard games, because they would be the best options available. One way to make Expert games less frequent would be to have a set schedule for them or to make the hosting requirements even stricter. Also, if they were less frequent, Expert games would be a bigger deal and would be more highly anticipated.