Madara really isn't Obito
If madara was in Obito's body then he would have one eye.
But at the summit with the five kages he stated the he would use the jubi's power to strengthen his EYES which means he has more than one eye.
However his ability to travel trough dimension is quite similar to kakashi's it may just be a coincidence or it may be the fact that their both of earth affinities. Madara is the only uchiha with an earth affinity so far. Maybe his dimensional power is his brother's tech which he absorbed when his EMS was implanted, so the earth affinity thing is not really a good theory.
Madara also said he is a mere shell of his former self
This may not mean any more than he is now just to weak carry out his plan alone. But Since the appearance of tobi's sharinghan his mangekou version has never been shown even when half his face was revealed, when he tried to reveal himself to sasuke.
Maybye if he tries to activate his EMS he will die or be sevearly injured.
What if the first hokage sealed away his MS and he needs the jubi to break the seal?:banned:
Or what if he used super poke jutsu and poked madara in the eye.?:cali
LAMO LAMO LAMO LAMO.............LAMO
But seriously if he could of used his MS he would not need the akisuki or sasuke, even if he did need them he would of at least used it against danzuo to get the shisui's eye which was so dear to him.
The fact is madara has lost the use of his MS.