I think I know how to deal with any sharingan, even MS :
Well take Kakashi for example - he has one sharingan eye that is activated all the time right ? And now how does he make it unable to affect other people ?
Just by covering it by his forehead protector -THATS IT !!!
- If Kakashi can nulifie his sharingan and MS by covering it then everyone battling an uchiha can simply do the same, well not exactly. I assume its very difficult to somehow cover your opponets eyes in the heat of battle but there is another way to do it ...
... you dont need to cover sharingan, but make the sharingan eyes to close. Thats not sooo difficult. And so I came with THE MOST RIDICULOUS COUNTER SHARINGAN STRATEGY OF ALL TIME - so read the spoiler on your own behalf( it may be tooooo ridiculous to comprehend )
I know, I know , it sounds stupid and ridiculous but hey, I warned you