Yeah. It’s mentioned in the Plug-In Pack that it’s totally optional.
When I run it, I use it if NPCs initiate hostilities or use ambush tactics, but you don’t need to do that. It’s just there if you want it.
A better way would be to let the PCs get a Reaction vs enemy DS Action Roll to ‘dodge’ in the first instance if the NPCs kick off, assuming the PCs don’t want to just go on the attack. If they fail said Reaction roll, they take the difference in damage from the first strike (as standard).
I’ll make it clearer in the combined POD edition (currently in progress).