Sony keeps standing its ground on the decision not to add first-party PS5 games to its new PS Plus subscription, unlike its competitor, Microsoft's Xbox Game Pass, which features Day 1 Releases of its first-party big new titles.
As a part of the company's recent financial call, Sony CFO Hiroki Totoki reiterated this point saying that the company believes that an immediate release of AAA games in the subscription service will lead to a decrease in investment in their development and will worsen the quality of these games.
"If we distribute [first-party titles] on the subscription services, we may need to shrink the investment needed for [quality products]," Totoki said (transcribed by @Genki_JPN). "That will deteriorate the first-party title quality that is our concern."
In other words, Sony is not going to revise its strategy yet, and players shouldn't wait for the next God of War, Spider-Man, and other titles in the updated PS Plus subscription.