Courses: Import file and keep the original elevation data

When you import a .gpx file for a course, GC "corrects" the elevation profile. There should be an option to maintain the original elevation data (if it exists), similar to how it is handled with activities. GC's elevation correction is really bad in steep areas, especially side hill trails where minor discrepancies between GPS coordinates and their elevation model appear as a significant noise in the elevation profile. So, I'd like to maintain the elevation data in my .gpx file.