To be fair though, the flames of truth isn't a true spoiler. It's details about the past which you would have normally only seen in t12, yes, but it never HAD to be locked behind it. A lot of us apparently have little hope of beating it, so it still hasn't ruined the whole story of coil.
Essentially, If that part had been added onto end of an era from the very start, it would have not changed coil much, though I can guess at the whole reason we go there now. (Still on T5, I stopped trying until I watched that, now I'm more interested in getting more details and started trying again a couple of days ago.)
