I saw the rainbow colors, thought, "wow, that's terrible. I won't play that, but surely they'll fix it before release - this is Blizzard we're talking about," and I didn't pay any attention after that. I actually had no idea that they even released it eight years ago. It might have gone a different way had they made something that didn't betray all of the things I liked about the real Diablo games.
I paid for this game, and I've never completed Act I. It just wasn't what I was looking for. I've since played a lot of Diablo II on /r/slashdiablo