I am pretty sure that the celestial plane and the primal plane are connected and that area usually looks the same every time I explore, large lake with a single line towards the portal, maybe a place near the brass keep that blocks the celestial portal around where the fir tribes hang out? As a possible fix to the bad portal connection.

What bad portal connection?

Could there be rituals to summon Centaurs, Centaurides, Minotaurs and such, or maybe rituals to mass upgrade units to their bronze and steel counterparts please? It wouldn't necessarily fix the spawn rate issue but it would at least give Dryads a way to help reduce the tedium of having to wait several turns to make their armies decent.

There is also a major bug with Herbal Remedies. It seems to just disappear. I do not know why I did not touch your code.

Has the Barbed Ent not attacking do to lack of range been fixed be now?