And the award for BEST ARMCHAIR QUARTER BACKING FROM THE SIDELINES GOES TO.....
ClunckDriver.
Dude - it amazes me how you seem to have all the answers. While I don't know why the turn back .. perhaps the extra fuel put them over landing weight.. (Can happen on shorter segments) Perhaps the RSC was unacceptable once they put the numbers in the FMC.. Perhaps the Captain was having a slow day and totally for all ****s and giggles decided to abandon the destination - just to change it up ( cause i'm sure that was on his/her plan for the day)
Point is - neither of us really know.
But hey - like I tell anyone who doesn't like the service or the product. Please feel free to shop elsewhere.
WJP