A Good Mechanic or...

[Osvir]

The lore explains the Druids lore connection with nature, for sure, it does not explain the Druids growth into generalists (only statistically, under Spells). It is ambivalent. It says Druids can call these various powers (in a broad sense), that doesn't mean there are Druids that only call lightning, or Druids that only Spiritshift. Or Master Druids that have mastered all elements of nature.
 

Druids' spells often take the form of natural phenomena—storms, coiling plants, rapid decay—to reflect their primal connection to the world. Despite their heavily-offensive nature, they do have a few defensive and healing spells to aid their allies

 

It does not say "a Druid" is what I'm saying.

Priests have a good explanation to how they gain their powers (but I still think they should gain fewer at a time), much like the Clerics, Priests grow "closer" to their Diety by leveling up (and that's how they gain more spells). Is not Nature a Diety?
 

Priest is one of the playable classes in Pillars of Eternity. Priests are devoted followers of one or more deities, though almost all have a primary dedication to a single god above all others.

 

The stronger the faith, the stronger the Priest.

Edited August 25, 2014 by Osvir

[Osvir]

Just something I found, for more Druidic inspiration.
 

http://arsmagica.wikia.com/wiki/Druidic_Relations_With_the_Fae

Though, with this sort of explanation, then it'd make sense if the Druid got all spells (the spirits of the soul gathering to the Druid, who holds secret knowledge). This could explain a Druid, but it still puts it in the generalist pit.

This also serves as Drudic inspiration, only historically rethroical (the essence of the evolution):


My Druid imagined is somewhere around 1-5 and the 2002 Hero~

Edited August 26, 2014 by Osvir