Exactly. It was a design decision that we took from the start. Legend of Grimrock 1 & 2 are a good example of a recent indie game with "old school" controls on purpose. It was a big inspiration for our game.
BTW - this vid seems to show Legend of Grimrock playing with mouse-look: https://youtu.be/xALsxZv0pwg?t=8m53s
BTW 2 - just discovered that cursor keys can rotate. WASD for motion and L/R cursor keys to rotate is waaay better for me.