All those item changes, but not a single peep about Ohmwrecker.
I'm going to assume Riot just doesn't know what the f#$% to do about the item. It's only good when your team is ahead, but the other major AR/HP items are simply better for tower diving, so no one ever needs (or wants) Ohmwrecker. As such, people who see it and want to try it out end up buying a noob-trap item.
After all, towers are already reliably useless, and the 6.9 changes are probably not going to make much difference with that.
What's the story, Riot?