I like AC, but he does very little outside of shooting and scoring. He might become a consistent 15-18 ppg scorer eventually, but he needs that shot created for him as his handle is suspect. 77% of his 2pt makes last season were assisted. 96% of his 3pt makes were assisted. His defense has improved but he still fouls too much and reaches when he shouldn't. He's not a true 3 and D guy. And his versatility is also overstated-- he's a SG, with prototypical SG size, but not the strength or length to switch onto bigger SFs like Kawhi, Lebron, KD, etc. And he lacks the quickness to guard PGs. If you recall, we didn't put Crabbe on CP in the playoffs -- we put Hark on him.
I would hate to lose an asset for nothing in return given how much we desperately need talent, but if there are better C options that open up in a S&T, we shouldn't hesitate to move on.