So Disney replied to me. Sure seems like official line is as website states that rider switch is for guests too short OR who don't want to ride. If a CM stays otherwise, guest relations or supervisor should be contacted. Here's the email I received:
Thank you for taking the time to share your experience with us.
We truly appreciate that you are such a dedicated fan of the Walt Disney World Resort and that you care enough to share your feedback. As you stated, our Rider Switch Service is designed to assist families with a Child who either does not meet the height requirement or does not wish to experience a particular attraction. We are sorry for your disappointing experience with this service and for any incorrect information provided to your family during your past visit. Our hosts and hostesses are always expected to maintain our company's reputation for providing outstanding Guest service, and we apologize if your past experiences did not reflect the high standards for which our Cast is known.
You may be assured that your feedback has been forwarded to the appropriate Leadership. It is through feedback, like yours, that we learn what we must do to ensure the Disney magic is preserved for everyone. If you feel our policies are not being upheld during your future visits, I encourage you to either ask to speak to a Leader at the Attraction or visit Guest Relations. Our Cast Members will be able to best assist you during your visit.
If you would like to speak with me directly, I am available Sunday and Saturday from 10:00 a.m. to 5:30 p.m., Monday and Tuesday from 11:00 a.m. to 6:30 p.m., and Wednesday from 10:00 a.m. to 5:00 p.m. EST
We look forward to many future opportunities to entertain you.
Best Regards,
Angela Brooks
Guest Experience Services
Walt Disney World Resort
She provided her contact info which I have removed for obvious reasons. I will certainly be testing this on our upcoming trip, as my 9 year old boy WILL NOT ride everest, despite being more than tall enough.