It´s my first Post here. I would like to thank Paizo for its wonderful work and serious effort to make D&D an even better game.
Your work is great, and as a form of retribution for sharing it with us, I would like to post below two humble suggestions reggarging Feint and Tumble combat maneuvers.
Feint
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As a move action, you can attempt to feint your opponent in combat, but if you fail your feint check, you provoke an attack of opportunity from the defender.
You have to make a feint check (1d20 + BAB + Dex Mod or 1d20 + Bluff skill bonus) against DC 10 + target's BAB + Wis Mod or DC 10 + Target's Sense Motive Skill bonus, to attempt to feint your opponent in combat.
Special: If you have the Improved Feint Feat, you gain a +2 bonus on your feint checks.
If you succeed in your feint check, the target is considered flat-footed on the next attack you make against him on your current turn.
If you fail in your feint check, the defender can make an attack of opportunity against you.
Special: If you have the Improved Feint Feat, your failed feint attempt does not provoke an attack of opportunity from the defender.
Tumble
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As a move action, you may attempt to tumble past your opponents without provoking attacks of opportunity, and position yourself in the opposite side of the target you were threatening before the start of your movement.
You have to make a Tumble Skill check against DC 10 + target's BAB + Dex Mod or DC 10 + Target's Acrobatics Skill bonus, to attempt to tumble past your target without provoking attacks of opportunity from him.
Special: If you have the Improved Tumble Feat, you gain a +2 bonus on your Tumble checks.
If you succeed in your Tumble check, the target is considered flat-footed on the next attack you make against him on your current turn.
If you fail in your tumble check, you move to the opposite side of the target, but provoke an attack of opportunity from the defender as normal, and he is not considered flat-footed to you.
Special: If you have the Improved Tumble Feat, your failed tumble attempt does not provoke an attack of opportunity from the defender.
Special: If there are other opponents (beyond the defender) threatening the spaces you move past, you must make a Tumble check against each opponent (DC 12 + opponent's BAB + Dex Mod or DC 10 + opponent's Acrobatics Skill bonus), to avoid provoking attacks of opportunity from then. The Tumble check base DC increases by +2 for each additional opponent avoided in the same round.
Acrobatic Tumble: If you take a -5 penalty on your Tumble check, you can make a acrobatic tumble to move through your opponent’s square, and end your movement at the opposite side, without provoking attacks of opportunity.
If you succeed in your cinematic tumble check, the target is considered flat-footed and suffer a -2 penalty in his armor class on the next attack you make against him on your current turn.
If you fail in your cinematic tumble check, your movement ends before you enter the opponent’s space and you provoke an attack of opportunity as normal (except, if you have the Improved Tumble Feat).
I hope it helps to improve your product even more.
GDD.