Unfortunately I can't give you hard and fast rules about this - it will depend on the precise question wording.
However, FWIW I would be thinking about these sorts of practical or operational issues if the question asked me to discuss all of the factors that a company would consider when doing something (for a reasonable number of marks) or how it would go about deciding which approach to take out of various options, where each of these is a viable or acceptable way to achieve what it wants to do. But I would be less inclined to feel that going into detail on the operational issues were needed if the question is asking whether a particular actuarial / technical method is a suitable way of achieving a specified goal. Particularly where, as in this particular case, only one of the options is really actually viable, so whether or not it is going to take a bit of work operationally is basically irrelevant.
Although the question is 10 marks in total, bear in mind that you have got four different surplus distribution approaches to consider - which breaks it down into much smaller pieces, so there isn't a huge amount of depth needed on each.