Possibly, but even still, Kyrie is as good as a 1st overall pick and he's a proven commodity. IT was the man but we all know how much of a liability he was on defense, which was kind of an issue since this team is supposed to have such good defense.
They've got Irving, Hayward, Horford, Brown, Morris, Tatum, Smart and others, plus still have the Lakers' pick and their own picks. Hopefully Irving sticks around more than 2 years, but I think he will want to. He just wants to be "the guy" on a winning team. Hayward and Horford are both great players but are not that kind of guy; they'll definitely allow Irving to be "the guy."
Meanwhile, LeBron and Isaiah could both walk away from Cleveland after this year and Cleveland would end up with just Crowder, Zizic and Brooklyn's hopefully-high pick.
I still feel a little ill giving up the Brooklyn pick but I'm optimistic.