是的，黑暗视觉、元素抗力等EX都会在变身后失去。
而变身无法获得任何SU和SP，至于可以获得的部分EX如下：
You have the physical qualities of the assumed form.
Physical qualities include natural size, mundane movement capabilities (such as burrowing, climbing, walking, swimming, and flight with wings. Physical qualities also include natural armor bonus, natural weapons (such as claws, bite, and so on), racial skill bonuses, racial bonus feats, and any gross physical qualities (presence or absence of wings, number of extremities, and so forth).
You do not gain any extraordinary special attacks or special qualities not noted above under physical qualities, such as darkvision, low-light vision, blindsense, blindsight, fast healing, regeneration, scent, and so forth.
（这两段话在Rules of the Game 和法术描述中都是一样的）
包括了体型、移动方式、天生护甲、天生武器、种族技能奖励、种族奖励专长及额外的翅膀胳膊等身体特征。除此以外的EX都得不到，因此黑暗视觉得不到，箭鹰的能量抗力自然也得不到。（关于毒、能量免疫是否获得，我持保留意见，详细见下面的回帖）
至于Hold Breath，在衡量时并不属于EX、SU和SP，而是“Natural Ability”，解释如下：
Natural Ability: This term is a catch-all for just about anything a creature can do (or characteristic that it has) that is not extraordinary, spell-like, or supernatural. Natural abilities include most speed ratings (some very high speeds are not "natural," see the section on the alter self spell), mode of breathing (lungs, gills), natural armor and weaponry, general appearance, body type, and the presence or absence of the five basic senses (sight, hearing, touch, taste, pain). When polymorphing, you generally lose your own natural abilities and gain those of your assumed form.
（这段话是在Rules of the Game 变形那几篇的Part One最后一段）
（注：以在下的理解，最后一段话说的是“基本的”五官感觉，例如有眼睛就能看、有舌头就能尝味道、有鳃就能水中呼吸之类，因此并不包括黑暗视力、盲感这类“特殊”的五官能力）
