BC is better on AD Caster type ADCs now than LW, unless the team is heavily, heavily stacking armor or you have no other AD champions on your team.
Miss Fortune gets BC instead of LW in most situations now. Corki can use BC, Ezreal can use BC.
Vayne was screwed the most out of all ADCs. There is simply no AD/AS/ArPen option is great as the old Black Cleaver was. That and the fact that movespeed was nerfed across the board for most of her viable items really destroyed her. Statikk Shiv is okay on her but it's nothing like the old lategame Vayne was.
Not changing this sig until Walter Mondale is elected president. Currently Playing: Pepper II, Venture, Frogger
Also, is Liandry's and Rylias' going to be core on majority of AP mids now?
Dunno about Rylai's being core but Liandry's will on almost everyone, especially those with a range advantage. Liandry's on Karthus with his wall is hilariously strong though RoA is still a great rush item for him. Liandry's on Ziggs makes his slowing spell do 10% of the target's health turning it into a huge damage spell.
My favorite is Liandry's on Fizz. One form of his E makes Liandry's hit for 10% of health and, combine that with his DoTs from W, if your target flashes away they bleed to death in a few seconds.