Here are the vault settings with my experience tweaking them:

  "InteractMaxHeight":
  This one setting is 99% of the mod. It's the height a climb will be attempted. You could bump this up to make things feel more grippy, but how high your character moves up won't change. 
  
  "InteractMaxLength":
  This is how close in front of you a wall needs to be to attempt a climb. I left this at default. It didn't help get to more ledges because where you climb up to does not go further out. 
  
  "MinDistantToInteract":
  IDK what this does but was with the other two. Didn't notice any effect. 
  
  "MaxOneHandAnimationHeight": 1.2,
  How high a the one handed climb animation transitions into a two handed climb. One hands are slightly faster, so this could be boosted, but raising it higher than the vaulting hight will cause conflicts.
  
  "MaxWithoutHandHeight": 0.65,
  How high you can do a no-handed step up. I left this at default. Looks wonky past 2
   
  "VaultingInputTime": 0.5,
  I didn't notice an effect lowering this to 0. I could still vault as quick as I could press a key. 

  "AnimationVerticalSpeed": 1.1,
  "AnimationForwardSpeed": 0.8,
  How fast you climb. Left at default. Adjust .1 at a time.