I don't think MSL's tactics and FaZe meshes well. MSL is great at running set strats, fast and direct. It's great for teaching new pro's how to attack a site. But I think the FaZe players are a layer or two beyond that. I think they prefer a more loose style.
I think you might be right, but as IGL he would probably do it better than NiKo himself. And maybe it's a great match with the coach Ynk as well. He seems to be one that prefers structure and set strats :)
Sorry for the late answer. I think MSL did great for a while in dignitas and in the beginning of North as well. Every line-up after that has felt a bit unstable. He certainly is a better IGL then NiKo :)