Ninja Spy

One of my players was wanting to play the ninja spy PrC from Oriental Adventures, and was wanting to tweak it a bit because it's for a Pathfinder game. I saw this as a prime opportunity to give him a buff that might not be rejected and offered to do it for him.


Ninja Spy 
Prerequisites: Evasion class ability, Dodge feat, Stealth 7 ranks 
Hit Die: d8 
Base Attack Bonus: Medium 
Saving Throws: Poor Fortitude, Good Reflex, Good Will 
Class Skills: Acrobatics, Bluff, Climb, Diplomacy, Disguise, Escape Artist, Intimidate, Perception, Sleight of Hand, Stealth, Use Magic Device 
Skill Points per Level: 6+Int modifier 
Weapon & Armor Proficiency: A ninja spy gains proficiency in the blowgun, hand crossbow, chijiriki, fukimi-bari, kusari-gama, nekode, ninja-to, shikomi-zue, shuriken, and war fan. A ninja spy who wears medium or heavy armor cannot use the following special class features: Acrobatics, Evasion, & Infiltrate. 

Class Abilities 
Acrobatics: Gained at 1st level. A ninja spy gains a +10 competence bonus on Balance, Climb, and Acrobatics checks. In addition, a ninja can always choose to take 10 on a Balance, Climb, or Acrobatics check even when circumstances would normally prevent him from doing so. This increases to +15 at 5th level. 
Thousand Faces (Su): Gained at 1st level. A ninja spy gains the ability to change his appearance at will, as if using the spell disguise self. 
Poison Use: Gained at 2nd level. Ninja spies are trained in the use of poison and never risk accidentally poisoning themselves when applying poison to a blade. 
Poison Resilience: Gained at 2nd level. The ninja spy gains a +4 circumstance bonus on saves against poison. 
Sneak Attack: +1d6 at 2nd and 4th level. 
Hide in Plain Sight (Su): Gained at 3rd level. A ninja spy can use the Hide skill even while being observed. As long as he is within 10 feet of some sort of shadow, a ninja spy can hide himself from view in the open without anything to actually hide behind. A ninja spy cannot, however, hide in his own shadow. 
Improved Evasion: Gained at 4th level. A ninja spy can avoid even magical and unusual attacks with great agility. If the ninja makes a successful Reflex saving throw against an attack that normally deals half damage on a successful save, he instead takes no damage. Even if he fails his saving throw, he takes only half damage from the attack. The ninja can only use improved evasion if he is wearing light armor or no armor. 
Henshin No Jutsu (Sp): Gained at 5th level. A ninja spy can use tree shape at will, but can turn into any Large inanimate object. 
Infiltrate (Su): Gained at 5th level and usable at will. A ninja spy can very briefly ripple through the Ethereal Plane in order to step through solid objects. As a swift action, for the round, the ninja spy can walk through any object up to 1 foot in thickness. If the ninja spy attempts to perform this through a material thicker than 1 foot, the ninja spy is shunted back to his original position and takes 1d6 damage.