I have no doubt there is value in it for some, but Id venture a guess that most of those people would be first time visitors (please note I said most, not all).I added what got left out.
Just because there is no value for you, does not mean there is no value for anyone.
The dessert buffet and JTA have value for those wishing to attend it, yes. Thanks for adding that. As far as not waiting in lines or getting a better spot to view the shows, I weigh the cost of the tour versus getting their a bit early to get a decent spot for a show and that using a FP+ for Star Tours, TGMR or the meet and greets is nearly the same. Sure, you wont get a FP for all three, but standby for TGMR or Star Tours usually is not that bad, especially compared to a 7 hour tour.
But as you said, there will be those who find value in this. It would be nice though, if Disney trotted out something worthwhile for returning guests or major Star Wars fans that they cant experience on their own in the parks.