Have the writers forgotten about Celestail Warlocks?

[GentlemanVoodoo]

It seams like the writers wrote the discription and mechanics of the Celestail Warlock in chapter 1 of Xanathar's and then forgot about them.
There seams to be very few Warlock spells particularly higher level ones that do not seem thematically inappropraite for a
Celestial Warlock.

I can agree that the warlock does need a few more selections for the higher level spells but also the design of 5e so far has not to been pouring out the spells for individual classes so as to avoid content bloat. Also you want to talk about forgetting subclasses then that is the Undying Patron for the warlock.