Fun fact: Susano'o can turn!The rear of Susanoo is fully exposed.
If there's nothing to attack against, obviously there's nothing to defend against.When Obito becomes intangible he is using Kamui's ability on himself [You must be registered for see links], if he's not attacking the Mirror with the Jutsu then there is nothing for it to defend against.
I don't want to copy paste Wikipedia here, sorry.What facts? You can't apply Science to this fiction genius. You didn't even explain anything. "blah blah and this happen, the end".
OT: I'm a Physics major.
The only flaw is that Itachi himself can't counter Yata mirrorExactly
Yata Mirror has its flaws and weaknesses.