Dodge has always disappointed me as a feat because it showed so much promise. The idea that a character could pay specific attention to one particular enemy and gain defensive bonuses from it is pretty cool. Its just that a +1 dodge bonus is lame in the extreme for the amount of effort it requires to use.
If dodge had been the first step down a chain of feats that eventually led to a handy +3 ac, +3 reflex saves, +3 opposed rolls versus that foe, or something, then it would have been pretty sweet. You'd see fighters taking it to improve their disarm attacks, etc.
The Swashbuckler tried to fix this problem, but failed due to general lameness.
My brainstormed dodge feats:
Feat: AC Dodge (feat subtype, Focused Combat)
Prerequisites: Dex 13
Benefit: Each turn, designate a opponent. Gain a +1 dodge bonus to AC versus that opponent until your next turn.
Special: The bonus provided by a Focused Combat feat is equal to the number of Focused Combat feats a character has chosen. You lose the benefit of this feat when immobilized or otherwise unable to act.
Feat: Reflex Dodge (feat subtype, Focused Combat)
Prerequisites: Dex 13, AC Dodge
Benefit: Each turn, designate a opponent. Gain +1 reflex to Reflex Saves versus that opponent until your next turn.
Special: The bonus provided by a Focused Combat feat is equal to the number of Focused Combat feats a character has chosen. You lose the benefit of this feat when immobilized or otherwise unable to act.
Feat: Opposed Dodge (feat subtype, Focused Combat)
Prerequisites: Dex 13, AC Dodge
Benefit: Each turn, designate a opponent. Gain +1 to all opposed checks made versus that opponent until your next turn.
Special: The bonus provided by a Focused Combat feat is equal to the number of Focused Combat feats a character has chosen. You lose the benefit of this feat when immobilized or otherwise unable to act.
Feat: Shield Dodge (feat subtype, Focused Combat)
Prerequisites: Dex 13, AC Dodge
Benefit: Each turn, designate a opponent. Gain DR 1 versus all attacks from that opponent until your next turn.
Special: The bonus provided by a Focused Combat feat is equal to the number of Focused Combat feats a character has chosen. You lose the benefit of this feat when immobilized or otherwise unable to act. You must be wielding a shield to get the benefit of this feat.
I know feats that grow exponentially have the potential to spin out of control if you write too many of them, but this is just brainstorming.