This 'no easy buttons' thing I keep hearing in this thread...
So, you want to keep people from running the raid via them not managing to flag for it, despite beating all the quests?
That's not challenge, it's restriction and exclusion. Easy button would be if they nerfed the raid. I don't think they will do that though, and the Abbot will still continue to wipe out groups that don't respond correctly to his big attacks.
Redoing the flagging to be more like shroud or Reaver's Fate/Fall of Truth or CiTW or ADQ or MA/LOB isn't 'easy button'.