I have been giving final rounds in my company (tier 2 firm) for the past year in I have given that feedback to maybe 2 or 3 people.
What happens is that if you see someone is pre-formatted, done a tone of causes, memorized every single thing and you are not able to get a genuine answer out of the person, what is the point of doing an interview? I will never know how the candidate react in real case conditions.
Again, dont get me wrong, I'm not saying dont prepare, but if you solve the cases like a robot and you sound like one that will just stress out the interviewer.
My recommendation is, when you hear a new product launch case, dont simply think in your end on a pre prepared structure to solve new product launches. Think about the case it self, make an effort to understand what is going on, what do you need to know in order to get to an answer. I love it when itnerviewees are able to pull from real life and sound like they are solving a real project with me.
Just my 2cents