Total talent level is obviously through the roof, but what jumps out at me in the negative:
1. Below average outside shooters.
2. Lousy defensively.
3. LeBron and Embiid are 100 years old.
If they get the chemistry right with the younger guys (Maxey, Edgecombe, Brown) leading the way, LeBron orchestrating (still a plus passer and plus efficiency scorer), and Embiid is more of the ultimate wild card / matchup buster... and true role players emerge... they could be a Finals contender.
Of course, expecting great chemistry and optimal roles out of this group sounds about as likely as simultaneous peace amongst OC Housewives and the Middle East, but maybe that's just me.