Nobody has actually answered the question to "why is this not a required event" I agree. But I think nobody has the answer. My question, is why aren't Tier I events as a whole required events like the ATP Masters Series. It's true that the seasons are too long, but I think more and more players are becoming pick-and-choosers and these low level tournaments with all the "secret amenities" like Dubai are causing more and more higher level event to be weaker than they should be.
I really don't understand all these deciding points if a tournament is a Tier I or a Tier II ! I read next year the WTA tournament Dubai (Tier II) will increase the prize money to $ 1,5 million. That means more prize money than in any other Tier I tournament (except IW and Miami) but why it will not be a Tier I after that increase? At least there was nothing written about it.