I'm merely saying that they could have avoided some of the issues if they designed a new game from scratch.
And AFAIK LoL was designed from scratch, it's Dota that actually based on the code of the WoW mod. Not that it matters today, that code is long gone.
Btw, you are thinking of Aeon of Strife (Starcraft mod). World of Warcraft hasn't even been released back then.