It is impossible to have a plan for every possible contingency for every takeoff. At the end of the day the situation where the Captain will have only a few seconds to decide what to do for an emergency will usually fall into the fairly obvious keep going category, but there will be the odd one where all the skill and knowledge acquired to get to that left seat will be called on to in maybe 2 or 3 seconds make a decision that will be very consequential.
The only defence we have is good training and effective line checking to keep standards up, something I would suggest was deficient in this airline.