As others have stated the purpose of the Echo buff is to help bring newer or less progress players up to speed with current content. The content that is having Echo applied is being made irrelevant in 2.2 save to gate access to 2.2 coil and EX trials. It's not like this isn't something that has been a known fact for some time now.

If it didn't take an untoward amount of development resources I would suggest they create a series of normalized versions of the instances that synchronize effective item level to the recommended minimum, require to queued as a full party, don't have Echo, and force the 2-2-4 comp. Add in a series of associated achievements with a title and vanity reward. There, an incentive for those who already did it and a challenge for those who haven't done it before the Echo.