It looks a lot of the sub-types contradict the base form for starting evolutions.
For example, consider the Azata sub-type:
Azata sub-type wrote:
Biped (limbs [arms], limbs [legs]) or serpentine (limbs [arms], tail, tail slap).
Meanwhile, the base forms read:
Base Forms wrote:
Biped
Starting Statistics: Size Medium; Speed 30 ft.; AC +2 natural armor; Saves Fort (good), Ref (poor), Will (good); Attack 2 claws (1d4); Ability Scores Str 16, Dex 12, Con 13, Int 7, Wis 10, Cha 11.
Serpentine
Starting Statistics: Size Medium; Speed 20 ft., climb 20 ft.; AC +2 natural armor; Saves Fort (poor), Ref (good), Will (good); Attack bite (1d6), tail slap (1d6); Ability Scores Str 12, Dex 16, Con 13, Int 7, Wis 10, Cha 11.
Does a biped azata gain claws at first levels? The base form says it does but the azata sub-type makes no mention at it.
Unrelated, but it also seems that the author of the Magic Attacks evolution doesn't know how sub-types work:
Evolution wrote:
If the summoner is 10th level or higher, all of the eidolon's natural attacks are treated as the alignment of the eidolon for the purpose of overcoming damage reduction.
Unchained Eidolon wrote:
Alignment: The eidolon is a creature of this alignment. If its alignment is chaotic, evil, lawful, or good, it gains that subtype.
Subtypes wrote:
A creature with the good subtype overcomes damage reduction as if its natural weapons and any weapons it wields are good-aligned.
There are corresponding rules for each alignment sub-type. An eidolon automatically counts both its natural attacks and weapon attacks as its alignment.
