Boots

Rendered useless now that the MS is only 10 above any other boots. The duration of slows is just about negligible on them. We didn't buy them for a watered down version of tenacity. We bought them because the effects of other boots generally sucked by comparison and if we're going to waste an item slot on movement speed then we may as well make the most out of that movement speed. You want people to buy other boots? Remove this item altogether then! DO what you did to the boot upgrades based on the data that most people opted for Alacrity. If everyone has +X speed then nobody has +Y speed over everyone else.

Attack speed isn't the reason we avoid this item. It's the fact ADC's have almost no MS and are killed off at any time that they are caught out. Hmm. What to buy? Boots that slightly increase attack speed in addition to the attack speed granted by existing items OR boots that will help Target #1 avoid getting caught by 3+ enemies?

The reason no one buys these even when faced by an all AD team is the fact that teams have too much CC and damaging abilities. Maybe once upon a time when CC was a blessing given to an ADC by their ally rather than an ADC already having it built into their kit!