It is important for me that my favorite genre: evolve, develop, move to a new level of interaction!
So ...
I think it would be possible to add some cinematography. Make QTE (Quick Time Event). By activating this event by quickly pressing the button for 1-2 seconds. And show a short video of the ambush scene.
Which will depend on the skill of attention or observation. That is, necessarily requiring its study.
For example :
1) Wars could beat off an arrow from an ambush. So as not to spend allies' HP before the battle ..
2) Bard, Dodger .., Ranger .. Could indicate a trap so that the group would not fall into it. Etc...
3) The magician would detect magic in this place ... or monsters.

Correction. Replace QTE with the roll of the dice window ... Also, you can think of new ways to such events (passive ..)
for better shot chances.

[Linked Image from i.imgur.com]