^ I think it reflects the southerly movement of St. Johns County "center of population" with Silverleaf, etc. coming on board. Only a matter of time until, like south Florida, that there is one long "city" from Jacksonville to Daytona. And, as you note, this picks up I-95 directly.
It appears that the Peyton development is mainly going to cater to residents living in northern St. Johns County and south Duval. Not much there that would be "destination" shopping for a wider area as most of its stores can be found scattered about NE Florida, unlike, say the luxury stores and high end restaurants at Town Center.