I personally wouldn't use RTH it that situation. I would only use RTH if a) the transmitter dies or b) I die! I can see no reason to use it otherwise. It is not some get out of trouble button, that is what your brain is for. I think RTH would only work if the multi is working correctly, but the pilot is unable to give commands for some reason (transmitter problems or incapacitation).
Way more preachy than I meant to sound! :nevreness: