1. You can use the Lunge feat to increase the reach of your melee attacks by 5 feet for use with a standard action but not full attack until the end of your turn, without suffering a penalty to your AC. You cannot use this feat if you carry a medium or heavy load.
Just slightly rearranged the words but now it should work as intended.
2. When you overrun an opponent and your maneuver check exceeds your opponent's CMD by 5 or more, instead of moving through your opponent's space, you may stop in the space directly in front of the opponent (or the nearest adjacent space) and make one attack with an unarmed strike or a natural weapon against that opponent as an immediate action in addition to knocking her prone.
3. No Idea
Honorable mentions go the rogue talents Powerful Sneak and Deadly Sneak.
Thought about this more after my momumental math bungle, but you could probably just combine powerful sneak and deadly sneak into one talent: i.e. levels 2-8th (or 10th), it treats 1s as 2s, from (9th or 11th+) it treats 1s & 2s as 3s. I'd remove the penalty to hit, as well.