The Current State of Dragoon

[Shurrikhan]

I agree the number of eyes can't change. Per the lore the 4 remaining dragons are Vrtra, Azdaja, Hraevalgr, and Tiamat. This can't be reduced unless one of them dies

Couldn't the BotD or LotD itself be considered as the "Gaze of the <First/Fourth> Brood"?

That said, the gameplay differences between LotD per 3 Eyes and LotD per 4 and Dive Ready on DFD come down simply to whether or not you want greater frequency or greater dynamics, assuming output is balanced accordingly. With the latter, you get the same speed of first entry (2nd Jump at 30s), but a much more varied interval thereafter, whereas LotD per 3 Eyes would be entered every 60 seconds on the dot after the first at 30s.