Alright, this is my first pathfinder homebrew. Please critique honestly, but gently? :P
My basic idea was to create a Fighter Archetype that could use improvised weapons well, without loosing out on what is arguably the Fighter's BEST class feature, Weapon Training.
Improvised Weapon Fighter
IWF is proficient with only Simple Weapons.
This Modifies Weapon Proficiency.
IWF gains Catch Off-Guard and Throw Anything as bonus feats at 1st level.
This replaces the Fighter Bonus Feat at 1st level.
Absurd Training Regimen
IWF may treat specific non-weapon objects that are usable as improvised weapons as if they are weapons that they are proficient with, for the purposes of class features and feats that apply to a specific type of selected weapon (e.g. Weapon Focus, Weapon Spec, Improved Crit, etc).
Shovel, Guitar, Chair, or Severed Limb are examples of the correct level of specificity. Farm Tool or String Insturment is to vague. Orc Arm or Wing-back Chair is overly specific.
When the first feat for a given item is taken (generally Weapon Focus) it should specify the Improvised Weapon's class (light, 1 hand, 2 hand) and Damage type (P/S/B) in the following manner: Weapon Focus (Shovel – 2h Bashing) or Weapon Focus (Broken Bottle – Light Piercing)
As a specific exception to the normal threat stacking rules (i.e. they don't) if you take Improved Crit with an improvised weapon and Improvised Weapon Mastery, your crit threat range becomes 18-20/x2
This replaces Bravery
IWF may select Light Improvised Weapons, One Handed Improvised Weapons, and Two Handed Improvised Weapons as Weapon Groups for Weapon Training, and for the purposes of any feats that refer to Weapon Groups or Fighter Weapon Groups. They are not limited to these groups, and may still take normal weapon groups.
This modifies Weapon Training
IWF must choose an Improvised Weapon they have Weapon Focus with for this feature.
This modifies Weapon Mastery
Additionally a related 'Advanced Weapon Training' option, that isn't tied to the archetype, but is thematically linked.
Advanced Weapon Training: Trained Improvisation: (This may be taken for any weapon group except the Improvised Weapon Groups)When you use a normal manufactured weapon from the selected weapon group as an improvised weapon (for example, using the butt of your long spear to hit an adjacent enemy, or clubbing an enemy with your crossbow) you still gain the benefits of Weapon Focus, Greater Weapon Focus, Weapon Specialization, Greater Weapon Specialization if you have them with the weapon.
Additionally, if the weapon is magical and has a +1 or better enhancement, it counts as a +1 magic weapon even when used in an improvised manner.
Normal (Per Core Rulebook FAQ): A normal weapon used as an improvised weapon (such as using a Long Spear's butt end as a club) does not benefit from any weapon specific feats (such as Weapon Focus (Long Spear)) and does not benefit from any magical enhancements.