I wouldn't want to bring them down. It would just set up splinter units. I'd like them to change their policies re blood and disfellowshipping, though I do believe they now regret ever putting them into place.
Get rid of the blood thing, the disfellowshipping thing and the 2-witness rule and i wouldn't have any more reason to quarrel with them. Apart from denying education, spoiling Christmas and messing up relationships generally!