They have plenty of key rotation guys on rookie contracts, they have lots of tradeable picks, they need defense and someone who create for others, the need a veteran that's taken a team to the finals. He is exactly what they need, they have the contracts to get him, they already have capelas replacement on the roster. They will have plenty of picks in the bank even after the trade. Imagine this lineup used in small amounts. PG Butler 6-7 SG Daniels 6-7 SF Risache 6-8 PF Jalen 6-8 C Hunter 6-8
They will be mismatches everywhere and defensive can just switch everything. Hawks are a perfect fit for butler.
Miami gets two guys that fill needs on this team. They perimeter offense and a center. Capella has an expiring contract which might be a good thing for Miami if they want some cap relief. They will get some good draft compensation in this trade, and cap flexibility.