homeguard, I agree with you.
I introduce the radionav fix as a break from the GH element - to simulate someone going off into the local area, rather than on a pre-planned navex, then getting uncertain of position. "Using navaids of your choice except for ground radar and GPS, I want you to tell me where we are".
Later, I do the simulated entry into cloud, then the 5 min course tracking on the way back to the aerodrome to let the applicant relax as it's so easy. When we finish, he/she will know where he/she is and will then take his/her 'passenger' back to the aerodrome and fly a normal approach and touchdown.