Back in 2.0 - you had Titan HM and BCB Turns 1 through 4 which provided a perfect amount of "intermediate" difficulty for players. This content was "worthwhile" because it was either a roadblock (Titan HM) or a means to earn "some" of the best gear at the time (Titan HM and BCB turns 1-4).
Look at the game today. Crystal tower and the new dungeons are without a doubt "easy" content (understatement). Then you have BCB 6-9 that are all hardcore content. Where is the intermediate content for players who don't have dedicated FC parties and countless hours to invest picking up hardcore strategies?
The main difference between 2.0 and 2.3 - is that in 2.0, the intermediate content would have been the means for a player to earn "most" of the item level 110 gear (item level 90 at the time). In 2.3 - this is primarily done via the hunt (or via hardcore content). In my opinion, players would find it more rewarding to earn item level 110 content via intermediate difficulty content than the hunt.
The extreme primals are intermediate content - but the main problem is that they provide item level 100 gear. Item level 100 gear can be achieved via the easy content (soldiery / zodiac). This is different than the system established in 2.0 (which I believe was more preferable).