Not Used: Druids

Is it possible that they could choose to be worshippers of either Andra or Borzig? It makes sense that Andra would have no clerics, but it feels like Borzig should be able to have druids.

I could see that, although from my perspective, Borzig seems more "domesticated/civilized", not quite as 'wild and free' as druids should be.

I could see druids being able to choose the four elemental deities as well as Andra very easily.

Druids can be lawful, so I never looked at them as having to be wild all the time.

I personally would like to see more diversity in who Druids serve - Typhis, Aquar, Harcourth, Conflagral, Terris, and Borzig druids would all be welcome additions, I think.

Wild does not necessarily mean chaotic

One can be a ol crotchety hermit in the woods type who disdains civilization, but is still "lawful" in terms of thinking that things should behave a certain way by certain rules.

Druids have always been the "specialty priests" of Andra in Aenea (going back more than 20 years now PnP, starting in 2nd Edition). They already get access to most of the "classic four" elemental type spells.  The elemental deities already have their own priests (clerics) and wouldn't have a reason to grant other "nature"-centered spells or the ability to change into animals via Wildshape.

While Harcorth, Borzig, and the elemental deities domains touch on isolated parts of nature, Andra is the goddess of nature that controls things that encompass all of them.