I'm just gonna leave this here
You know, just a small list of past threads, some heavily upvoted and/or have Rioter comments, about Executioners calling getting removed in the first place. How it was horrible to build stat-wise and rarely bought, yet people complained about it anyway, whining about how champs that are healing focused would run the game. "Well yeah, the item was horrible back then, but with the Preseason patch it's actually useful and builds into a strong item!" Link to the older Executioners Calling at the bottom of the list, the one used up until season 3, which was niche as shit yet still very strong.
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/YtvpWGcc-with-executioners-calling-gone
http://boards.na.leagueoflegends.com/en/c/GD/MERYBFqP-executioners-calling-just-yesterday
http://leagueoflegends.wikia.com/wiki/V1.0.0.61 (gotta hunt for it, but it's there)
My point? Grievous Wounds has been and always will be niche, unless it's attached onto a very strong, must rush item, which it isn't. By buying the new item Mortal Reminder, you are throwing away your ability to deal with higher health opponents (unless you can effectively build Bork at the same time or have it already in your kit) by not getting the counterpart, Lord Dominik's Regards. Maybe the GW duration is overtuned, but past that it's a perfectly fine item, that you typically won't even start until mid-game without losing a lot of power against non-tanks, or durability to survive a duel with your lane opponent, who may not even have enough armor to make it worth the buy. Now please, stop complaining about how Mundo or Vlad are going to be useless, because they sure as hell weren't when E.C., and by association GW, were at there strongest. CALM. DOWN.