Sumio Mondo
Member
Sort of. There isn't really a D team, but C team is far below A and B teams in terms of quality.
A Team = Kamiya; B Teams = Saito, Hashimoto; C Team = Kurooka
I don't even know what the NieR team would be classified as, since the director is from Square Enix. I guess you could put Takahisa Taura into his own team, despite having worked with Saito on MGR.
Taura also worked on The Wonderful 101 and Anarchy Reigns as game designer, which is also something else to consider. There is no definite set teams aside from Kamiya leading them. Like how Hashimoto worked on Star Fox 0 as co-director.