Building the team or building my team? Can your team be too strong? According to my experience it can happen when talented leaders are being placed for too long in a position and too remote from the center. Here is a nice piece from Joseph Grenny who worries about teams going tribal. How can you identify and then detribalize your team. I particularly like the last piece of remedy, sacrifice periodically a team need in favor of the company. It works.
https://hbr.org/2015/06/signs-your-team-is-too-strong-for-its-own-good