I like this trade for both sides.
Great move for LAC. That's a good haul for a rental. Shamet is a very solid prospect who is already shooting 40% from three as a rookie, and that Miami pick could be excellent (though as the Kings are showing us this year, it's dangerous to make assumptions about how a team will play in 2+ years).
For Philly... they got the best player in the deal. It was a lot to pay for a three months of a borderline star, but they probably have the best starting five in the east now. The second round with MIL/TOR/BOS/PHI is going to be ferocious. And assuming they re-sign Butler and Harris, that will officially end The Process. No more cap flexibility, no more premium draft picks. This is the 76ers.