flyingnewbie10 and Dreamland are now entering into the realm of fantasy flight safety, where the ultimate solution is to ban flight altogether.
On a fully serviceable A320, if you leave one T/L in the CL detent and select reverse on the other on landing, you will get exactly the same result in terms of engine thrust behaviour and operation/non-operation of stopping devices. One thrust reverser inop makes no difference.
By denying the use of A/THR on approach and landing you take away a proven safety system for no reason, and increase the level of risk.
Airliners have been flying for years with various items of equipment inop, subject to MEL rules, and always at the Captain's discretion.
TP