Heck, I grumble enough about Shell/Pennzoil/Quaker State when I don't agree with their marketing strategies, let alone any other oil company. However, they are entitled to market and provide products. Simply put, a dexos1 offering was sorely missing outside of the Pennzoil-Quaker State line, and this fulfills that shortfall without needlessly affecting the Formula Shell lineup. Oil companies can't win. If they would have made Formula Shell synthetic dexos1, people would be complaining the last non-dexos1 big name synthetic has bowed to GM. They don't do it, and the formulation is behind the times. Go figure.
Fleets now have a need (or at least a defensible want) for dexos1 oils. Rotella is often a choice among fleet purchasers. The conclusion of those two premises is obvious.