This should have been managed with the Solo instance mechanic. Other games introduced this option but they also had a massive over buff system applied with it. In LotRO you can do out dated raids solo but you go from 8K health to 160K health with massive offense and defense stats getting buffed as well. What it does is preserve the original content and simply manipulates character stats that void out the content difficulty and design, be it hit point wall bosses or adds zerg. U can absorb the damage and complete the raid.