I think shields should be overhauled in this game.
Don't just downvote with your "LOL I SEARCHED YOU ON OP.GG AND YOU HAD A BAD GAME ONCE THEREFORE YOU KNOW NOTHING" malarkey.
I just think they can do a whole lot with shields in this game!
For example, they can rework Lethality so that on top of armour pen, it also makes you deal bonus physical damage to shields.
Or a new Resolve rune! Where shields grant you %damage reduction based on the shield size (33% effective if shield was given to you by an ally). It could replace the Revitalise rune, and then the Revitalise rune can be put in the Inspiration tree where it actually belongs!!!
Literally, anything could be done about this! It would make stuff like Overheal and Bloodthirster more viable, and it would make champions that give shields something more interesting than being just some shield dispenser.