Believe me when I say, coordnation between all of the tours would be an ideal situation. However, with all of the factors involved, I'm not sure how practical it is.
At the beginning of the year, I'm guessing that the TD's try to target the best dates for themselves. Maybe it would be more accurate to say, they are marking dates when they can not possibly run a tournament. Let's not forget, they have lives too.
After that, the TD's are constantly negotiating with room owners to get them to sponsor tournaments. I believe the room owners will always have the last say in when the tournament takes place. Yes, after reaching an agreement, the TD can call the other TD's, but what happens if the other TD's are in negotiations for the same weekend? Which tour, if any, should get preference?
This is a very tricky business and all of the TD's have to tread lightly. First they are, in effect, begging owners to give up their normal business for a weekend and then to donate some prize money. The owners know they will get very little in return. At the very least, they should be allowed to pic the best date for them.
I think, in the end, we both just want some good regional tours, which we have. We are much luckier than some other parts of the country. However, because we are so lucky, we will have to live with some conflicts, throughout the year.
Don't forget, conflicting tournamets tend to spread the talent a little thin, which in turn, gives some other players a chance to win. There is a good side to the conflicts.