Riot when you do the Warwick rework please consider giving Wit's end back it's season 2 niche.
It is not bought outside of Kayle, Teemo, Kog'maw, Warwick, Udyr and Shyvana and that is even pushing it for since it is bought more then 10% of the time by Kog and WW who have a kit which applies all the MR shred stacks in a really short time.
It lost it's niche as a strong early to mid game rush item with limited stats for the slot with the preseason 3 Changes which made it cost more and have MR shred which not all champs can make good use of. This is why Irelia who arguably had it being just as core as Trinity in season 2 stopped getting it all together.
The lack of any niche for being built is what really keeps it from being bought but if it was back to 2000 to 2200 in cost it would be considered against the likes of Vlad or other magic damage heavy tops for several attack reliant fighters.
It does not need the MR shred which as seen by WW and Kog proves to be way to good when it is good and easy to apply. It needs stats like it had back in season 2.
Also #UniversalAnswer