I really don't get what he says. Is he talking about 2 Tier in T20 or Test Cricket? As I can understand from your quoted text, that he might be talking about T20 WC. But your poll asks the same question refering michael regarding test.
Well if you want to ask, if a 2 tier system is ok or not irrespective of what Michael says; IMO YES, but it depends on yearly/bi yearly relegation/promotion system between tiers. No tier system without that can be feasible. Is it agreeing to Michael or dis agreeing?