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Regarding KB as support; Bee is pretty bad as a support. His kunais suck. His justu can be done others, but better. Course, his justu is nice to have as a "back off" support. And since it isn't so good or vital, Bee can be a good guard support. Bee only has one team bonus team. Jinchuuriki( Bee, Gaara, any Naruto). He gets 3 red(U3 damage), and 3 purple(Support gauge speed) for having regular Naruto and Gaara, while he gets 4 red and 2 purples for having Sage Naruto and Gaara.
IMO he's below average/near average and loses out to the more superior supports, only use for him for Team Boost.