Will 2.1 offer any lasting content to players who are on or cleared turn 5?

[Leadros]

You don't need Crystal Tower. CT is meant for future players to progress through on their way to coil. It is not meant for progression of the top 10% of the playerbase.

despite having to relay on a age old meme, whats meant for people who are at turn 5 or have cleared turn 5? whats in there in 2.1?