I knew you could do a lunge attack, with the duelist, with blind spots; like if you can’t see a mob that’s behind some tall grass, a stone pillar, or you’re in a garden, but I just realised you could do the same through doors. This will help with managing the sewers, crabs in particular. I assume door lunges should benefit as a surprise attack as well.
Normal weapon damage doesn’t increase with surprise attacks. It’s this way only with dirk and assassin blade. But yes, lunging through doors is still useful.
I thought a surprise attack would increase the damage as well. But this isn’t like DnD or something. I couldn’t find anything supporting my assumption with a quick search either.