You Can Do More
Riot, I know that you are not about to change the lores you have now given us but can you go more in-depth. Say, enough to be called a paragraph. I know what you have a great new story for renekton and nasus so I want to see those now put in description. Cassiopea could be more descriptive on where and why she got the powers. You could say Ezreal is still cocky yet doesn't like the attention and does not want to be in the "lime light". Amumu can still be a yordle (just doesn't know it) and boom, you give him the ears. Just make the lores longer.