I would say that "changing and building a team" is not as easy as a lot of people think. I saw a company replace their employees multiple times, yet their culture could never be changed, thus every team constellation was set to fail like a cruise missile.

Once a organisational culture is set, it is very difficult to change [1], especially if you can't replace the head of the beast.

[1] Team Geek - A Software Developer's Guide to Working Well with Others, Brian W. Fitzpatrick, Ben Collins-Sussman