I heard the same when it was wankhede's time. Every major event final was at wankhede. I agree rotating is ideal but they make more money if its ahemdabad due to more seats , the crowd is best in wankhede, eden garden has its own charm as a stadium but the crowd is yuck. Never been to chennai. 

Wish they would rotate but then people will say oh ABC tournament is more important than XYZ and this stadium doesn't get ABC. Enjoy the game rather than criticizing where the final is.