There are specific advantages to this particular pairing. People coming south on I-5 and either continuing south or turning east on 58 to Bakersfield will first stop at Buttonwillow, and only if that's full will they proceed to Stockdale Hwy, from which they can still continue south or turn east and drive direct to Bakersfield on a slightly slower road. Those heading north up I-5 and turning onto 99 will stop at Tejon Ranch, and those heading north up 5 will first stop at Stockdale, and only go to Buttonwillow if Stockdale is full. As a way to increase capacity and de-conflict traffic it's just about ideal, even without real-time monitoring of availability.
They'll still need a 'real' Bakersfield SC, along with the obvious other points along 99 (at least Visalia/Tulare and Merced plus Yuba City/Marysville, Chico and maybe Oroville) and a few more on 5 to boost capacity and convenience, including Lost Hills, Kettleman City, Santa Nella and something to shorten the 170 mile leg between Manteca and Corning, whether Williams, Dunnigan or the western Sacramento area.