I am having the same experience.

@..., @..., and @..., what I believe @... and @... meant is that the default role that is preselected when clicking on "Manage in Admin Center" from a user record, used to be "Light Agent" and is now "Contributor". This is an extra 4 clicks to switch to "Light Agent" and then save, what used to be simply changing it in the user record has now become, one click to go to the Admin Center then two clicks to set it to "Light Agent" (here the new default is Contributor) and the last click is the Save button (without counting closing the new Admin Center browser tab)!

@..., I think this is the answer to your question about the difference between Light Agent and Contributor? And additional details about Light Agents.

Does anybody know how to do this with fewer clicks?

Thanks!