Perhaps the best strategy for Marvel Studios to remember is that Spider-Man is a tangible part of the MCU, and should be treated as such.
That’s not to say it should lessen his significance, but there definitely needs to be a Plan B for the studio in all future Phase planning for what happens if Peter Parker isn’t around in a couple years.
And, for what it’s worth, Sony should recognize that Spider-Man being a part of the MCU is about the best promotion any superhero franchise can get in this era of filmmaking.