Doom PvP

I'm still wondering why Riot haven't made this into a gamemode already, a pvp with improved doom bots skills and random passives like those of the doom bots, I know probably Riot doesn't know how to balance such power in some champions, but it doesn't really matter that much when you see that game modes come and go really fast.

I do think a mode like this one would be far more fit of The Harrowing that "One for all, now in the Rift" (Like everything else).

Even lore could be easily wrote for Doom pvp, being the Black Mist the origin of the improved powers, while one for all riftmade...well... is a 1 vs 1 between ninjas that can copy themselves cause of Harrowing?