However, if you left in a crazy ending part instead of covering it with a BRE, I'm not sure how well that would go over with reviewers. It would really depend on the song, and you will certainly find that out from other users during the playtesting stage before you actually submit your song for peer review.
I don't know anything about Highway Star or Thrasher, but I'm guessing there must be a logical reason for it. Do they really under chart songs for the sole purpose of making them easier? Aside from double bass, the only example I can think of is that drum roll in Wanted Dead or Alive.