Okay, redid the wording on how the Armor and Deflection bonuses work, and added some notes on how Familiars/Animal Companions/Eidolons/Cohorts might work. The redid parts are below.
Heroic Armor (Ex): Starting at 5th level, armor bonus to AC equal to +1, approx. +2/3 level after 5, to a maximum of +10 at level 19. (See the below table for a breakdown of how it works.) This does stack with the nonmagical armor bonus from armor, but not with Mage Armor, nor with any enhancement bonus to armor. A character using a shield in one hand (but not shields that are not carried in hand, such as the Shield spell) gets an additional bonus to AC equal to 1/2 of this bonus, rounded down, as a shield bonus that stacks with nonmagical shields. (So an extra +1 at 5th level, then +1/3 levels after that, to a max of an extra +5 at level 17.)
Heroic Deflection (Ex): Starting at 6th level, deflection bonus to AC (and therefore also touch AC and CMD) equal to +1, +1/3 level after 6, to a max of +5 at level 18.
So the table has now been changed as follows.
The terms used:
Saves: Saving throws.
Armor: Armor bonus to AC.
Def: Deflection bonus to AC.
Weapons: Bonus to all weapon attacks.
Abi: Ability scores. A () shows the +1 bonuses gained at high levels.
3: +1 Saves
4: Abi: +1
5: +1 Armor, +1 Weapons
6: +1 Def, +2 Saves, Abi: +2
7: +2 Armor
8: +3 Armor, +2 Weapons, Abi: +3/+1
9: +2 Def, +3 Saves
10: +4 Armor, Abi: +4/+2
11: +5 Armor, +3 Weapons
12: +3 Def, +4 Saves, Abi: +5/+3/+1
13: +6 Armor
14: +7 Armor, +4 Weapons, Abi: +6/+4/+2/+1
15: +4 Def, +5 Saves, Abi: +6/+4/+3/+2
16: +8 Armor, Abi: +6/+5/+4/+3 (+1)
17: +9 Armor, +5 Weapons, Abi: +7/+6/+5/+4 (+1)
18: +5 Def, Abi: +8/+7/+6/+5 (+1)
19: +10 Armor, Abi: +8/+8/+7/+6 (+1)
20: Abi: +9/+8/+7/+6 (+1)
-How does this apply to familiars/cohorts/animal companions/eidolons? I'm not sure, but here are some quick guidelines (these will almost certainly need refining and polishing):
Cohorts have bonuses as a PC of a level equal to 2/3rds of its own level. (Since it's an NPC, not a PC, it's a few levels behind on the gear. Also, it uses 2/3rds of its level, not the Leadership character's level.)
Familiars and Animal Companions gain the Weapons bonuses, but not the AC, Saves, or Ability Score bonuses.
Summoners may choose how to split the bonuses between themselves and their eidolon. If they have multiple eidolons, and bonuses the summoner gives up applies to all of their eidolons. If the summoner is a Synthesist: While fused with their eidolon, the summoner loses the Ability Score bonuses and the Armor bonus to AC (but not the Deflection bonus).
EDIT: Reworded part of the Cohort description.