Fourth thriller idea decision

As of recently, me and my thriller project group had decided to re-write the story of our Thriller, as we felt our film would not be able to use the Thriller conventions to their full potential, which would reflect very badly in our grades.
The reason we had come to this decision, was because we had found the story and the direction of our previous idea to be far too subtle and relaxed as we focused mainly on establishing the story and not enough on creating the tension of the film. As a result of this , subtle tone , our thriller would not create enough thrills for our audience and because we would only be marked on how well we get our audience invested into the film by thrilling them during the introduction, we would not be able to gain high marks.
We first became aware of this very low level of thrills, after we had re-read the story of our thriller a number of times and began to find it as coming off as quite boring and its suspense being very limited.
Since my group know that if our thriller did not use many thriller convetions and did not produce thrills as a final product, our grades would be badly hindered. Therefore it would only make sense to create another film idea, as it would be very beneficial for my group to write another film idea, which would be more intense and suspencefull.