I think it is important to keep in mind that the approach currently favored here, in which your choice of meta-ethics guides your choice of decision theory, and in which your decision theory justifies your metaethics (in a kind of ouroborean epiphany of reflective equilibrium) - that approach is only one possible research direction.

There are other approaches that might be fruitful. In fact, it is far from clear to many people that the problem of preventing uFAI involves moral philosophy at all. (ETA: Or decision theory.)

To a small group, it sometimes appears that the only way of making progress is to maintain a narrow focus and to ruthlessly prune research subtrees as soon as they fall out of favor. But pruning in this way is gambling - it is an act of desperation by people who are made frantic by the ticking of the clock.

My preference (which may turn out to be a gamble too), is to ignore the ticking and to search the tree carefully with the help of a large, well-trained army of researchers.