The Team GUI looks a bit cramped like that indeed.
Perhaps you can move the team captain part downwards (as you said it was now scrollable) and add some more options for team captains (as suggested) to the left of it, including the option to put team captains on or off for that team?
As long as the most important options are at least slightly visual when you enter the GUI, it should be fine, captains in team is a nice addition, but it is less important then the other things IMO.