The game has a pause, it's called "tactical pause mode" ? If you click on the "clock" above the skills, the game will stop.
Characters jump over traps and fire if possible. Astarion does not enter the water for an example or is looking for an alternative path. Traps are more difficult because you have to find them first, and that doesn't always happen. But in the case of fire, my companions often jumped over it, even if I was walking directly on it.
