Were u also excited after installing Far Harbor, going through the chemistry station finding a new tap called traps?
So was i till i used the first trap noticing the little advantage and the huge weight (especially at playing on survival) of the traps.

I decided to have a look at it using FO4 edit.
This is what i came up with:
-wrong description: the Bear Trap actually did 40 damage instead of 30 as the description suggested
-no crippling, limb damage or even stagger (definitely a bug!): I am pretty sure, it was intended to work as described but it was to time consuming. So they thought just dealing 30 damage to the health and having a medium stagger is enough. Poor job and a lying description. -_- sad.

Anyway, here is my solution:

Version 1.1.0:
Caltrops:
  Damage: 2 -> 4    //more a gimmick but the poisoned one should deal some damage.
  Slow 0 -> 15%;  Duration: 0 -> 13sec    //they now apply a slow, if you experience any trouble let me know!
  Reduced weight: 0.5 -> 0.3      //as u cant pick them back up and to compete with grenades in some way (mainly for survival).
  Increased projectiles: 5 -> 7    //to increase the stopping power, as they sometimes don't trigger.

Poisoned Caltrops:
  Damage: 2 -> 4;  Poison damage; 2 -> 3; Duration 5 -> 15    //wont scale -_-!
  Slow 0 -> 25%;  Duration: 0 -> 15sec    //they now apply a slow, if you experience any trouble let me know!
  Reduced weight: 0.5 -> 0.3      //as u cant pick them back up and to compete with grenades in some way (mainly for survival).
  Increased projectiles: 5 -> 7    //to increase the stopping power, as they sometimes don't trigger.

Bear Trap:
  Changed description to: High leg damage. Medium chance to Cripple. Causes bleeding.
  Changed break chance: 75% -> 35%    //that was ridiculous anyway, especially with a weight of 8!
  Applied a stagger: medium
  Weight: 8 -> 4
  Applied a bleeding; Damage: 0 -> 2; Duration: 0 -> 11    //still more than twice the basic bleed damage
  New stats:
    55% basic hit chance    //deals 30 health damage and 75% limb damage to either left leg or right leg
    45% crit chance    //deals 50 health damage and completely destroys one leg
  exact calculation explained at the end.. (#1)

Bleeding Bear Trap -> Sharpened Bear Trap:
  Changed description to: High leg damage. High chance to Cripple. Causes strong bleeding.
  Changed break chance: 75% -> 20%    //that was ridiculous anyway, especially with a weight of 8!
  Applied a stagger: medium
  Weight: 8 -> 4
  Bleeding damage: 2 -> 5; Duration: 5 -> 11
  New stats:
    25% basic hit chance    //deals 50 health damage and 85% limb damage to either left leg or right leg
    75% crit chance    //deals 80 health damage and completely destroys one leg
  exact calculation explained at the end.. (#1)

Version 1.0.2:

Caltrops:
  Reduced weight: 0.5 -> 0.3      //as u cant pick them back up and to compete with grenades in some way (mainly for survival).
  increased projectiles: 5 -> 7    //to increase the stopping power, as they sometimes don't trigger.

Poisoned Caltrops:
  Reduced weight: 0.5 -> 0.3
  increased projectiles: 5 -> 7

Bear Trap:
  Changed description to: High leg damage. Medium chance to Cripple. Small chance to miss.    //also changed the damage saying 25.
  Changed break chance: 75% -> 25%
  Applied a stagger: medium
  New stats:
    15% miss chance    //dealing no damage 
    65% hit chance    //deals 25 health damage and 70% limb damage to either left leg or right leg 
    20% crit chance    //deals 40 health damage and completely destroys one leg
  

Bleeding Bear Trap -> Sharpened Bear Trap:
  Applied a stagger: medium
  Changed break chance: 75% -> 25%  
  New stats:
    0% miss chance    
    70% hit chance    //deals 25 health damage and 70% limb damage to either left leg or right leg. Applies bleeding
    30% crit chance    //deals 40 health damage and completely destroys one leg. Applies bleeding.


Any suggestions or comments are very welcome! (#2)
This mod is actually planed to be part of my weapon overhaul (another one? yes! i am not happy with the existing ones, especially playing on survival including melee.)


Installation:
  Save to install/ uninstall. Only player placed traps are affected thus easy to handle.

Compatibility:
  VIS patch available (also sorts the traps to the bottom!! Sort top mod can be easily done if requested).
  Runs with every weapon mod if placed afterwards (like WBO e.g.)


#1 Calculation:
  Bear Trap example, Sharpened Bear Trap according to it:
  Checking the leg condition of the OTHER leg, if it is above the set bound and hits a certain percentage, it damages the targeted leg.
  Resulting in only damaging one if the other is still intact. If one leg gets damaged during this process, it damages the health.
  Then checking whether one leg is below a certain bound and the other above a certain bound. If so and it hits the right percentage, it kills it and dealing
  extra damage.
  I wanted the traps to never cripple both legs, as it would be way to strong and doesn't make much sense anyway. Also placing two traps shouldn't be
  to strong due to the break chance and the heavy weight although it has a very high chance of instant crippling.
  If you encounter a melee attacker just shoot the legs first. Together with the bear trap u have very decent stopping power.

#2 Planned or possible changes:
-  I am currently thinking about removing the perk requirements for the basic bear trap, as u most likely will use it as a ranged kind of player.
   But if the traps are good enough, maybe its worth it spending a point into it ;). // rather not, therefor you have the Caltrops
(-  Increasing the Caltrop damage.)
(-  thinking of having to break chances for the bear trap, about 35% for the rusty version and 20-25% for the shiny one.) V1.1.0
(-  Probably changing the weight of the Bear Traps to make them more useful) V1.1.0
-  Adding a "no really big creatures" as it would be OP if you just cripple a Deathclaw with it
-  As often requested there is probably going to be an op-version to always cripple and stuff..

 
If you find any language mistakes, let me know. It's not my mother language :)
Have Fun!