There are other ways around the traps. That is exactly the point, when walking as a group with other ways to walk that are not blocked by traps the part members that are not your lead will still walk right in the area where the trap is rather than walking around them. Sure, you can navigate them individually to avoid them, but it would make more sense that if you know where the traps are and you navigate your lead character through the area that is not trapped the other members should follow through that same area rather than walk to the side of you where they already know a trap is waiting to deploy. It would not make the traps pointless because in areas where there is no other way to proceed except through the trap you would be required to disarm them. What I am suggesting would apply to an area like in the first dungeon where there are all the runes on the floor with some being trapped and others not being trapped it would make sense to be able to navigate them safely as a group once you have discovered them. Again if there is no other way to proceed past the trap then that is when you would resort to disarming them.