This is sad to hear, and I hope Yoshi-P will reconsider.
When you introduce new content (new gear, new skills, new levels), the old content naturally nerfs itself. For example, introducing Crystal Tower essentially nerfs Bahamut's Coil. This is a good way to do things.
Please remember that, just because someone levels more slowly, it does not mean they want content to be easy. When you explicitly nerf the old content, you are doing something unfair to casual players. You are stripping all the challenge (and fun) from the game. Even Blizzard has learned this lesson. They stopped nerfing old content but provide item upgrades instead. Please learn from their mistake.
