Woodlice are quite a menace where the compost has some old wood, its their favourite habitat and food.
I have not noticed them eating potatoes before, how do you know its not slug holes that woodlice have moved into?
In terms of having less woodlice, grow potatoes in more decomposed, less woody compost?
In general terms, your total loss sounds ok, its rare that nothing is eaten or damaged, a few pests is good for other parts of the food chain.
