Nothing is certain in life....

If you want to travel on a certain date and flight you book that sector when ticketing.

Just yesterday I booked my next 4 open sectors on my DONE4 LAX-DFW-BZE-DFW-LAX. My dates were fairlu flexible. My only constrinat was I had to get flights on which I could upgrade my wife's disc Y AA ticket. So I used the Availability Tool to find the dates/flights which had both C and D availabiluty on the DFW-BZE-DFW sectors (the domestic sectors all had plenty of A availability). Once I found them I called and booked.

Thing is if you undestand the system and how it works you work within it. Additionally, we all know that RTW tickets are disc Y/J/F and are treated as that - behind full fare Y/J/F respectively. SO where's the problem?