League of legends does it require so many changes.

I have been playing since season 1 and I liked the old school LOL more then the new stuff. To be honest I do not think that the game needs changing so much. And by changing the game you make some champs overpowered and others weaker. Like Eve, Shaco and Twitch used to be all good junglers but changes made twitch harder to jungle then the rest. These guys forced the other team to buy pink wards which was not a big deal because they would last the full duration usually. And can be put anywhere without the other team seeing it when they walk over it. But now you can not put a pink ward in middle of your lane to stop the shaco ganks, or in the river because the other team just clear them straight away. And the new items that just gives any champ true damage. Tanks worse nightmare, is it riot's intention to make it so that assassins can just melt tanks now? what is the role of the tank if he is dead? Rammus used to be strong all he needed was and some MR so he did not get melted by the apc. This build used to melt yi now yi and his on hit true damage he is left with half hp and rammus dies.

I guess my point is riot says they make these changes so it balances the champs, but these changes make it unbalanced to other champs so why change it in the first place.