Sometimes you bring guys in that are gaining a reputation to see what you think, but it's also a process of helping guys get their names out there. Part of me agrees with CK when he says Todd Bowles is the choice and has been from the beginning, but part of me also thinks that Sparano and Ireland want to bring something different to the table. A lot of HCs say that the best cordinators are guys that are willing to stand up to the HC. Crennell and Weis did it in New England, Ken Whisenhunt did in Pittsburgh, Rex Ryan did in Baltimore, his brother Rob has done it in Oakland and Cleveland, and Todd Haley did in Arizona. Now you don't want somebody whose just out there for himself (Mike Martz while in Detroit and SanFran), but you want somebody who knows what they want to do. Look at the weird adjustments Pasqualoni would make. 3-4 defenses are not supposed to be vanilla. Neither are 4-3s, but you can get away with that in the Tampa 2... but that's a different discussion.
As I've been saying since Paul got fired, he's too reliant on the OLBs for pressure, and drops the ILBs too far in coverage. He was basically running a Jim Bates version for the 3-4.