Just had a thought, why not move ADC away from damage in favor of more utility?
Instead of having every ADC build being mostly the same, why not give them some utility? Reduce or remove critical hit chance from some items, but give them more utility.
Ex:
This item would be the core crit item for ADC that favor critical strikes
Less Crit, more attack speed, useful for on-hit builds and teamfights, pretty much THE teamfight item
Remove Crit, now always give 150 bonus range. It is now the item of choice for ADC that want to sacrifice some damage for more safety
Now can hit towers by itself (without RFC), the item of choice for pushing lanes
Used to counter health and armor stacking tanks
Heal and Shield buster
Second core item for ADC that want to focus crit
Specialized for AD casters that also like some crit chance
Many of those items would remain mostly the same, but others would become more specialize. Right now every items that builds out of
are pretty much the same, and ADCs will always build the same, with very little flexibility.
By doing a small rework over those items, they could offer more utility in exchange of some damage.
Ex: You are Sivir and the enemy team has heavy zone control. You pick RFC for the increased range, which allows you to fight at a relatively safe distance.