From a statistical point of view, using TWO Rx's doubles up the failure rate of such a Rx. So you actually increase the chances of Rx failure. At the same time you will increase the redundancy of the total system, so at the end you may be back in square one. I personally would not use two Rx's due to space and complexity concerns. I have saved my last Bandit by having two batteries and two switches. Remember, look at the highest failure rate and fix that problem..

The question was: are you able to fly a jet model with half the controls. I think it would be very hard if not impossible to do so due to the flight characteristics of our jets and the heavy wing loading.

To increase your reliability, test all components in a prop model and after, say 10-15 flights, put the components in your jet. This is like doing your own burn in!!!