I've finally figured out that the only reason I find the click and drag system uncomfortable is because it's assigned to the left mouse button - this means that there's a danger of accidentally clicking something when you mean to move somewhere, or vice versa. Plus if I want to move across a room and interact with something, I have to hold the button down, let go, then press it again.
Would it be at all possible for the click and drag system to be re-assigned to the right mouse button in future?
That way we could interact with objects while walking, and it would mean that the double left-click run could return.