Wit's End badly needs slot efficiency

This is the one thing that keeps this item from being purchased; Wit's End is simply too hard to slot into its best-case scenario compared to any other item. Why would any self-respecting fighter buy an item like Wit's End with as situational stats and value as Wit's End has, when I could buy much stronger and more well-rounded items that, even if they're lots more expensive, give me much better powerspikes that I'm designed to require?

Even the terrible build path can be overlooked if the full item itself could actually justify the slot it takes up. If it had, like, you know, some health in place of MR, or if it got rid of its MR shred for superior stats and a higher price tag, then I guarantee you we would see this as a common pickup on champions like Warwick, Volibear, maybe even Irelia.