The thought of free leadership at 10th level got me thinking...yeah, it doesn't work for all fighters but it is a neat idea. How about a option for 10th level fighters:
Heroic Leadership (Leadership feat, +1 to leadership score, +2 at 15th level, +2 to diplomacy)
Heroic Damage (bonus damage based off of sneak attack, like +4d6 at 10th, +6d6 at 15th)
Focused Strike (+2 BAB, increasing to +5 BAB at 15th level)
Heroic Defender (+2 Insight bonus to AC, +5 at 15th level)
Learned Warrior (Choose 2 non-class skills and they are considered class)
Those aren't concrete, but just some ideas.
Heroic Leadership (Leadership feat, +1 to leadership score, +2 at 15th level, +2 to diplomacy)
Heroic Damage (bonus damage based off of sneak attack, like +4d6 at 10th, +6d6 at 15th)
Focused Strike (+2 BAB, increasing to +5 BAB at 15th level)
Heroic Defender (+2 Insight bonus to AC, +5 at 15th level)
Learned Warrior (Choose 2 non-class skills and they are considered class)
Those aren't concrete, but just some ideas.