I think they very much designed the raid for two things - to encourage/force acquisition of JTR teams by middle players, and to make sure that at the beginning at least, heroic can only be cleared by top few guilds. They stumbled on that last one, or maybe not - they maybe let st Han into production to give more people a chance to beat it a few times before it gets hard?
If I were c.g. I would not want lots of guilds to beat heroic in the beginning. But I would also not want to encourage burnout in the player base.
