I agree, Fighters are sorely lacking in high level feats, and reasons to go beyond 12th. IMC, I have greatly restricted the access to fighting feats for other classes, to provide more incentive.
Still, I feel there needs to be more. And I don't really feel that just tweeking +1 to hit or damage with a group of weapons or not is really enough.
There should be more weapon specific feats. Feats that can pnly be performed with swords, feats with only budgeoning weapons, feats for spears, feats that allow for amazing moves and manuevers. Feats that make people sit up and notice. "




! He knows the three-dead-monkeys move!"
Three Dead Monkeys
Your skill with a blade and fluidity across the battlefield are a sight that needs to be seen to be believed.
Prerequisites: Dodge, Mobility, Weapon Focus (any Sword), Weapon Specialization (any Sword), Improved Critical (any sword), Skill Focus (tumble), Spring Attack, Whirlwind Attack, Greater Weapon Focus (any sword), tumble (X ranks), Greater Weapon Specialization (any sword) Fighter 16th.
Benefit: You may resolve your normal full attack and move a distance up to your speed at any time during the attack routine as a full-round action.
(note: just thrown together on the spur of the moment... )
So a great sword wielder using the above feat could move up to an enemy (10ft), kill him with two blows, move up to the next (ten feet), Strike twice again, before retreating ten feet.
Those are the kind of feats I want to see for high level martial artists. Feats that require huge amounts of dedication and feats but that really make the battle go. Not some +½ to damage when circling backwards over manhole covers.