If I might, the following variants....
Shaper’s Gift (General, Magic)
Prerequisite: Transmutation Specialist or Spell Focus: Transmutation, 4+ ranks in the craft or profession of sculpting.
Benefit: You optimize the forms you take, such as by alter self and polymorph, increasing the physical statistics of the new form by a total of 1 point per 3 caster levels (i.e. a 6th level caster can adjust the statistics of the form he takes by 2 points, increasing strength by 2, or +1 to dexterity and constitution).
Lingering Enchantment (General, Magic)
Prerequisite: Enchantment Specialist or Spell Focus: Enchantment
Benefit: Subjects of your mind affecting enchantment spells that failed their saves remain partially subject to you for 1 day per level of the enchantment spell cast – these subjects begin 1 step friendlier when dealing with you. For example, a guard who fails his save against a charm monster spell cast by you (a 4th level spell), will be 1 step friendlier when dealing with you for the next 4 days.
Both are derived from your concept. The 1st is altered as it is of little difference to the typical specialist wizard unless they are warrior wizards, while the 2nd is altered to simplify it and give the benefit for the power of the spell (spell level) rather then the duration. That last part is simply my personal preference.
B
B