I Don;t understand something

In season 5 you made alot of balance changes to make everychampion balanced(atleast viable).And now,you guys are throwing away all of that.There will be alot of champions with the new items that are broken.The game will change alot.(maybe there will be 2 adc in 1 game now:)) I am diamond 5 elo,i personnaly loved the S4.But S5 was really good also(i enjoyed the changes)and now,you bascily make a new game. This game is played bcs of the gameplay.I don;t whant to have to do my homework in order to play this game:|.(i only play ranked games bcs that's what i like)and now,it seems i have to watch some streams,play a few normals to understand the overwhelming patch.Not to mention that there will be probably alot more to balance. Why did you change something that was looking pretty good?It was unecessary.This game is played purely bcs of it's gameplay