New Lore Clarity??

I'm just a bit confused as to why Riot decided to go about with removing some very important aspects of the current lore and remove all ties from the actual game to the story of Runeterra. Its just kind of frustrating to see something so key to the current lore that we've all grown to know and love be deleted. I guess id just like to know why this is the conclusion that riot has come to, like why not build off of the current lore instead of just change it. Even if the institutes removal is inevitable, why not go with something story wise that leads to its destruction or an uprising/revolt against it instead of just deleting it, i think you guys could get pretty creative and come up with something that could appeal to all or most members of the community but still grow the story extensively. I just hate to see that the battles we all have are just familiar faces with no purpose other than "kill, kill, kill, baron, kill some more, yay we win, GG" I guess i just like the parts of the story that give the game play some meaning and have actual context (however small) is all, it may just be me being a drama queen ;-; but i hate to see the story change so dramatically with no explanation.