User blog comment:UsoppThePotato/An idea for critical strikes./@comment-4956864-20131002202203/@comment-5605969-20131004134009

AD Casters have been in the game far longer than Quinn. Look at Graves. He is a champ that crit isn't as important as raw dmg, but he still gets it. Why? Because if he doesn't, as soon as he lays down his skills, his AA will be average. With crit, he deals good dmg. The reason there is no high AD/AS item is not because of ADC scale to late game. It's bruisers extreme flexibility.

Most items an ADC buys, bruisers can as well. Infinity Edge isn't picked up because most bruisers ALSO need tankiness, and IE LW is way to delaying to do, and offers only raw dmg, almost no benefits. But imagine a high AD/AS item with other advantages, such as unique passives and bla bla bla. All tier 3 items possess them, so it would be no surprise. Now imagine a bruiser like Jax or Volibear got it. They are already tanky as hell. They already do loads of dmg. Now they would carry hard, since 1 item would make them nearly unduelable. And AD casters. Most buy high AD cuz they rely on burst instead of sustained dmg. WIth high AD/AS items, they can burst AND duel. So the ADC role will only gain 1 benefit: range. And since gapclosers exist, it's not that big of an advantage.

There are many items needed in the league, like AD spell vamp and cdr for AD casters, and other type of items suited for a role, but if other roles can also use them, and it becomes unbalanced, then you get a problem. This is why there are high AD items and high AS items. So that you have to waste something to get both benefits. In most cases a slot. Many things come and go thanks to metas, and this meta benefits many bruisers, especially AA types. So a high AD/AS is not a great idea now.

And you mentioned Quinn, Lucian and Jynx as not needing Crit to deal dmg, but I dare you to play those champs, not get crit and then do more dmg than the enemy's ADC. An IE will boost a 300 ad to 750 AD. A triforce will make an AA after a skill do 200 more dmg at level 18. So a Lucian with 300 dmg would do 500 dmg, and thats every 2 secs if you have skills. Even AD casters need crit. Not as much, since they tend not to build AS, but they still need it.

In the end, Crit is needed because it separates a role from the others. Taking that item out is like taking Health and Rabadon's Deathcap. Health gains strength with defenses, and Rabadon increases your skill power by 30%. So yeah. Consistency beats inconsistency. No one says Rabadon is unbalanced, yet Crit is? Sure. Then maybe next time get some Armor. Most tanks nowadays reduce all damage from AD by 66%, and have at least 3000 hp to top it. Without crit, how are you suppose to take out 9000 hp?

PS: and if you build Quinn as an AD caster, pls never get in my game.