But even during the fight with the Kages he says that there need not be as much destruction as when he fought Hashirama. Destruction of that level can be done only by Susanoo (or something not known to us). And plus Hashirama vs Madara wouldn't have been much of a fight if Madara hadn't been able to use his ace.
Yup totally right about using the Mangekyou shortens your lifespan and removes your eyesight but remember that taking Izuna's eyes was his solution to ensure that using the mangekyou doesn't affect him.
Next few chapters going to be awesome!