Back to Chicago, and to free agency: This will be Chicago's last summer before Jimmy Butler is due a new contract, which will add another large deal to a pile that includes Rose, Joakim Noah, and Taj Gibson. Bring Butler back at a fair rate, ink Mirotic, and factor in all the picks Chicago is now due (including a first-rounder from Charlotte at some point), and the Bulls could be facing limited cap flexibility in future summers after this one. A lot can change, obviously; the cap will continue to go up, the Bulls will make trades, and Noah's deal is up after 2015-16.
But the Bulls have some incentive to use this newfound cap flexibility while they have it, either in free agency or in some lopsided trade. Remember: Deng may emerge as one of the top three real free agents this summer, and the Bulls just let him go. They have to replace his production, at some point, somehow. Mirotic and the picks will help, but the Bulls need more proven stuff on the wing in addition to Butler, Mike Dunleavy, and the untested Tony Snell. If I were Gar Forman/John Paxson, I'd think hard about breaking the bank for Lance Stephenson — an unrestricted free agent who could work on the wing next to Butler and effectively serve as the team's backup point guard, a role Stephenson is playing now for Indiana. Stephenson is a rare thing — an under-25, unrestricted free agent. The Bulls might have to carve out a bit more room to realistically chase him, perhaps by salary-dumping the helpless Marquis Teague, but it's worth a thought. (Side note on Mirotic: The 2014 draft will mark three years since the Bulls picked Mirotic, meaning they could sign him outside the restrictions of the rookie scale, per several league sources.)
If Chicago can't find the right free-agency target, it could hold the fort with a couple of affordable veterans, and use its new bevy of assets to kick around potential trade ideas for big names who might become available.
This trade puts Chicago in a very good place. It's hard to come out much better while losing an All-Star in what amounts to a salary dump/tanking maneuver.