Let them mortgage their post-LeBron future on Cousins. All the more dysfunction to screw up their chemistry with.
As far as "basically" iterations of the trade go, I prefer thinking of them this way, helps me visualize the values better:
Kyrie for Fultz
Tatum and Lakers/Kings pick for Isaiah, Crowder, Zizic, and the Brooklyn pick
I would make each of those trades a hundred out of one hundred times. But as they really were seems riskier, more even and uncertain. This way I am certain I want Kyrie over Fultz, if that had been the deal, straight up, and I'm almost just as certain I would easily then trade Isaiah, Crowder, Zizic for Tatum, #1 overall on the C's board. The Brooklyn and Lakers picks are kind of a pick 'em value-wise, a wash.