Just imagine. Madara uses izanagi to switch places with Obito. And because Obito is the 10 tails Jinchurika and can't use his eye techs anymore, he is powerless to do anything.
he can use kamui... doesnt use it coz he doesnt have to... he is invicible at moment and also kakashi in other dimension probably sucker punch him. madara should use izanami/ lose eyesight edo anyways..