Everything about the Garlean Empire feels underwhelming comparing to other story arcs we have in FF14. Emet-Selch being a interesting character because of being "Emet-Selch" but not being Solus zos Galvus. I have heard that FF14 was decided to end the Hydaelyn and Zodiac arc in 7.0 but because of how well-received ShadowBringer was Yoshi P decided to end the Hydaelyn and Zodiac arc in 6.0. My personal guess is the original 6.0 was going to be a Garlean Empire related arc.