My opinions
1-I would like the balance team to spend a good year to look at every single rune and how they can adjust the stats to balance them out
(such a complicated math system should be handled with care)
2-A new animation/picture system, something nice and fancy, the current system is so lame looking compared to hex tech crafting and the new shop
3-more options in how to organize our runes and pages. For example I personally like to keep all my ap pages next to the ap pages, and all my ad pages next to the ad pages, The fact that i have to delete every single rune page and completely redo them just so i can have it in a order that pleases me, is ridiculous. I should be able to just grab and glide, like when handling my folders on a computer.