You are on the right track with this. You should first get it working for all the possible fields and roles. Make the scenario as large as it may become.  Later, go back and look through the solution for areas to simplify. This approach helps me think through the steps first and then go through how ...

I have done this many times. The secret sauce seems to be to assemble JSON to replace the teams collection when doing a user specific update action. Take a look at the teams collection on the user object to see which teams fields are needed.Remember to remove the home team assignment when replacing ...