This was my main concern going in as well, but I played up through the first real interrogation mission last night and it seems to be structured in a way where you can still blow it, say by accidentally shooting a suspect or accidentally backing your car into a crime scene, running over a corpse (Both of which I did)

There just don't seem to be any dead ends when it comes to interrogation. But still... I found myself invested enough that I really cared about getting those questions right, so the challenge/fun factor was still there.