That's a more pessimistic take - the optimistic take may be well if Beal is back, he fits in. Just having Book, Beal, Durant - that opens up the floor to the other 2 players. So even players like Goodwin, Okogie, KDB, who aren't contributing a lot on offense, they would have more impact as you need less on offense. Similar, if you play Nurk and Allen, Gordon - you may have a lot of offense. The true judgement for the team comes when Beal and KD/Book all play. Because then you have a full throttle offense. Right now we see these dry spells on offense, would those happen with 3 stars?
Still, even with the optimistic view, I don't think we're good enough to win a title with this group, without at the very least 1 more defensive wing that can slide between 3 and 2 who is playable. Some of the players we have are either zero defense, or zero offense players. It's easy to double on KD/Book/Beal, this way. Or, on defense, it's easy to know where to attack.