Let me preface this with: This is all speculation!
So I may be the last to realize this, but I have the feeling that Gold Road was initially the Q4 DLC for Necrom. It follows the same format since Elsweyr. You complete the chapter then the dlc and when both are complete you get an over arching finale. This would explain so much! First, it explains the size difference between the other chapters and West Weald. Gold Road is closer in size to a DLC. Second, it would explain why there were no companions in the Gold Road "chapter." After all dlcs do not get companions. My theory is that ZOS had to figure out a way/time to implement to the fixes and updates into the schedule. So they pushed it into Q4 of 2023. Now the couldn't bypass Gold Road and release the next planned chapter in 2024 because people would be upset about an incomplete story. So Gold Road was padded with other content (scribing) to make it a "chapter." Knowing that the community had grown accustomed to getting 2 companions every year, ZOS may have decided to fast track two future companions so that we didn't do without. That would explain why they are being released later in the year and why there is a duplicate race being released before all the other races have been introduced as companions. My belief that scribing was added as an addition to Gold Road after deciding it would be a chapter is because the scribing questline has nothing to do with the West Weald storyline. In fact, it takes place in Summerset and can be accessed in most major Mages Guild Halls outside of West Weald. Also all the scribing quest are located in the base game zones, and not the dlc, I mean "chapter." It would also explain why there is no Q4 DLC this year, because the next storyline to follow would be a full chapter. That leaves the perfect opportunity to introduce the PVP to 2024 Q4 they've been working on. The reason that people feel like 2024's chapter didn't live up to the 10 year anniversary is that it wasn't meant to! Does this make sense to anyone else?