In an attempt to halt the most egregious abuses of the the spell while modifying the effect as little as possible from the pre-errata 3.5 base description, I'm thinking of adding this house-rule clarification. I'm looking for feedback regarding the clarity of the house-rule as well as the any unintended consequences.
A polymorphed creature is granted access to the natural weapons of the assumed form, but does not receive additional attack sequences. A polymorphed character continues to make attacks according to his base form’s attack sequence (Base Attack Bonus + natural secondary attacks, if the same attack form exists in the new form), but may make those attacks using his choice of natural weaponry. As an example, a 12th level Wizard is polymorphed into an 11-headed hydra. The Wizard can make up to 2 attacks a round with a BAB of +6/+1. A 12th level Fighter converted into the same creature can strike up to 3 times with a BAB of +12/+7/+2. The same Fighter converted into a dragon can make up to 3 attacks a round with his choice of 3 Bites, 3 Claws, 3 Wing Buffets, 3 Tail Slaps, or any combination of attack forms totaling 3 attacks. As a further clarification, all special qualities and special attacks are rated as extraordinary, supernatural, or spell-like. In the absence of clarification in the source material, a ruling will be made as to which category the ability belongs.
A polymorphed creature is granted access to the natural weapons of the assumed form, but does not receive additional attack sequences. A polymorphed character continues to make attacks according to his base form’s attack sequence (Base Attack Bonus + natural secondary attacks, if the same attack form exists in the new form), but may make those attacks using his choice of natural weaponry. As an example, a 12th level Wizard is polymorphed into an 11-headed hydra. The Wizard can make up to 2 attacks a round with a BAB of +6/+1. A 12th level Fighter converted into the same creature can strike up to 3 times with a BAB of +12/+7/+2. The same Fighter converted into a dragon can make up to 3 attacks a round with his choice of 3 Bites, 3 Claws, 3 Wing Buffets, 3 Tail Slaps, or any combination of attack forms totaling 3 attacks. As a further clarification, all special qualities and special attacks are rated as extraordinary, supernatural, or spell-like. In the absence of clarification in the source material, a ruling will be made as to which category the ability belongs.