While I'm not a huge fan of Starbucks directly, I feel like WDW is overlooking a significant aspect of 2024 WDW. With G+, someone has to be awake before 7am. First to buy it before 7am, then to book G+, ILL's, and VQ's all at 7am.
Yet many of the food courts don't open until 7am. I just checked, and it looks like some- maybe this week due to Easter? - open at 6am (GF,), and a few open at 6:30am (All Stars, AKL,). Most open at 7am = AoA, BC, Bwk, CR, Poly, Pop, POFQ/POR, Riviera, SS, WL, YC.
AK often opens at 7:30am for onsite guests. Busy weeks MK also opens at 7:30am, then HS opens at 8am. It isn't possible to book G+/ILL's?VQ's, get coffee/breakfast, and get to the parks in 30 minutes.
Maybe I'm wrong, but I think Starbucks would see a fair bit of early morning traffic before 7am.