fdr - if you look at Kulver and others' posts about one of the other RedWings over-run, you will see there is a possibility the engines might have gone to around 86% N1 forward thrust during the landing. Kind of makes stopping and going around difficult.
BOAC
Quite true. The previous event(s) is(are) significant, and highlight that the single point failure that result in compound retardation device failures is a high stress event, not often you get to see the controls being bent. Such an event being repeated entirely is possible, but also, even without that occurring, the outcome can still be a high speed overrun, just from the loss of all retardation devices, the engines are going to be back at approach idle thrust at a minimum unless shut down... and nothing else working to assist the decel, even aerodynamic breaking is a limited option.