Yes, I can see that when you will have a climbing animation, you will have to play with small matches so that the animation Will match the ladder mesh location accurately .
As for spline path, I think it is very important (and I speak only from a Visually point of view) to keep the sequence of one line (as soon as there is a break or any other sign instead its grabs the eye of the player in a negative way). I might have been using a curve table just for the part of up/ down spline path to give the spline the right curve.
anyway great work!