Technically it is a few issues that feed off each other.
First issue - Pathing combined with a default position to the selected character. This means if the main character cannot path for some reason and does the wiggle dance at a ladder or something all the companions will try to get to that default position and go nuts jumping/climbing about or re-pathing across the entire bloody map through combat zones. This is even worse when there is a hazard/ladder in the way. You will, as the main character, jump over said hazard and continue to your destination. Meanwhile each companion will try and calculate the best (most retarded) way of avoiding said hazard at the time try and get to your location even if it means one jumps over the hazard but sets on fire anyway, one goes walt disney and looks into the distance and the last one decides to walk 300 miles in a random direction.
At this point you are required to chain and unchain.....You then have to click another character to drag, but the second you do all the other fucking characters will try to path to that guy including from the place you already arrived at. But bacause the chaining is so mechanically broken it may take take a few attempts. At this point you will be in combat with one character, stood in fire with another......
P.S - Don't feed the trolls.
But... this is all very "intuitive". Right?
Anyway, just as Tuco said I've also given up any hope of Larian changing the toilet chain system. In fact at this point, considering the non existent community interaction, I'm fairly sure that Larian never wanted our feedback in the first place. What they truly wanted was our telemetry. They should just have released the game as open beta instead of charging money for it.