Boots (and pink wards)
Okay Riot, finally time for me to try and voice this.
For years now you have been upgrading everything in your game; items, champions, specifying roles, the look of the maps as well as buffs, etc. But what I've noticed is you've neglected something, one item that is very, very important, mainly because every champion in the game (sans Cass) builds them; boots.
The options for boots are very limited. You have attack speed boots, magic pen boots, armor/MR boots, CDR boots, speedy boots and... speedier boots. Sometimes it even feels like it's almost worth to sell the boots for combat stats, but after you sell them you remember why you kept them, every time. Every champion has a "best boot" for their build, but a lot of champions would do better with a little more option.
My first idea of fixing this was that you would have the base tier 1 boots, then tier 2's would only be the movement buff to 45, with no additional stats. Once upgraded to the second tier, you would be able to purchase boot upgrades, up to 4, and every stat would be available for purchase. You want boots that give you life steal, attack speed, attack damage and crit? Sure, go for it! How about attack damage, health regen, magic pen and MR? Whatever makes you happy. Make the second tier of boot 900g, and then every upgrade 550g from there. That way when you got to the late game your boots would feel like an actual item you want to keep as apposed to something you keep because you have to. Maybe you can come up with something better.
Side note: Can I have a damn pink ward slot? I hate getting to 6 items and not being able to buy one as any role, or having to sacrifice my 6th item as a support for a 75g ward.