It comes down to getting a setup YOU shoot well and what YOU feel comfortable with.

As long as your arrow is spined correctly and you are getting good arrow flight, there is no reason to change your setup. What you have is plenty for elk.

Going to a 100gr broadhead will reduce your FOC and your downrange momentum but will have the advantage of increasing the arrow speed a bit. Your KE will stay nearly the same.

With the season being this close, if what you have is working, stick to it, practice....practice....practice and get any last minute fine tuning done.