I like VfK's series of questions.
Games 4 and 5 were the keys to the series loss. Losing 20 point leads with a team that can play defense as well as this team does is inexcusable once, not to mention twice.
Losing last night was succumbing to pressure and too many guys trying to play hero-ball.
In terms of rebuilding, the key for Morey and company is to look at the two fourth quarters in the ridiculous losses. Answer the question of what change needs to be made to activate playoff fourth-quarter offense while not sacrificing defense. Can Simmons be part of a successful half-court, playoff offense? What player acquisition would "fit" with Simmons and Embiid? What role can the young guys play in changing that 4th quarter situation (if any)? You answer those questions, then you make your plan.
I think they simply need more shooting, particularly off the bench, but even in the starting lineup. Maybe Danny Green was that shooting in the starting lineup, but can you count on him at his age? Is Kork consistent enough? Will Milton "come back" to his former shooting prowess?
Or, they could break it all apart and trade 2 of the big three...