Wouldn't it be better if AS items for ADCs had the same AS & Crit baseline?
Because Phantom Dancer/Static shiv are such good damage options there's rarely much choice in what AS item you pick up after your Infinity Edge; at least that's my experience. If a decent group of AS items for ADCs had the same AS and crit-chance but different utility-esque effects, that'd free ADCs up to pick from a broader pool of interesting items; I'd love to be able to pick up Runaans, Zephyr, Youmuu's or even Guinsoo's for their unique effects. Static Shiv is cool, but I'd like it better to be able to pick up those other items now and then.
The same argument could be made for other item-groups; for example, maybe Infinity Edge could use some kind of "situationality" to it's effect, even with it still being a go-to "Big Damage" item for ADCs; that way other B.F. Sword-items could compete with it for first-buy a bit more.