What would Jobs have done better over the past 15 years?? Lets see... No idiotic notch BS. no keyboard issues and recalls. no removing useful ports then reapplying them. No falling far behind in the AI race as they are with the Siri garbage. No chasing every gimmicky thing the competition is doing. Most importantly, by now, he most likely would have invented additional products that the world didn't know they needed, but yet, ended up transforming the world.
Apple is a mess right now precisely because they don't have strong leadership, especially visionary leadership. Imo, Apple's success over the past 15 years is still all because of the foundation and legacy that Jobs created.