Neither Tata nor Vieira had to study the dark arts of MLS roster rules and how it relate to transfers. They also bounced off a couple of years after when a bigger opportunity found itself. The type of coaches from overseas that want to come here has ambitions to use MLS teams as a launch point for bigger clubs elsewhere.
It's a big reason why the manager system failed in the past. Most coaches who are former players have zero qualifications that would allow them to transfer any skills from the pitch into an office setting.