I think I'd like to amend the house rules a bit. I'm playtesting bits and pieces of combat changes here at EN World as well in my face-to-face game. As already noted, part of these changes are about how armor works. I've also got this that I want to try:
Expanding BAB
Every character has a Base Attack Bonus, or BAB. F&F* expands the uses for BAB two ways. First, BAB is added to your Armor Class as a dodge bonus. BAB reflects a character's general skill in combat This includes not only the ability to land a blow, but also the ability parry and dodge attacks. Furthermore, a character's BAB affords a certain amount of flexibility in combat from round-to-round as well.
Each round on his turn, a character can "shift" his up to his BAB to provide a bonus to a specific facet of combat. The same value is applied as a penalty to another facet. This bonus/penalty combinations lasts until the beginning of the character's next turn. A character can apply up to his BAB as a bonus to attack rolls, to damage rolls (for attacks that require an attack roll), or to AC (as a dodge bonus). He must apply the same value as a penalty to one of the two other facets.
For example, Horace Berkeley has a +1 BAB. He's facing three goblins in melee combat. Being outnumbered, he decides to fight cautiously. Horace adds +1 to his AC and applies a -1 penalty to his attack rolls. These modifiers remain in play until the beginning of his next, at which time Horace can keep them or change them as desired. A few rounds later, Horace has defeated two of the goblins. He goes on the offensive, applying a +1 bonus to his attack rolls and a -1 penalty to his AC.
This variable use of BAB in combat replaces Combat Expertise and Power Attack as feats. These two feats are simply removed from play. Feats for which they are prerequisites are treated as if they have one fewer prerequisites. Thus, a character qualifies for Improved Bull Rush as long as he has at least a 13 Strength.
Thoughts?
* This is a reference to Fencing & Firearms, a PDF that Spes Magna Games will be releasing next month.