For instance, MIRI's 2013 strategy mostly involves making math progress and trying to get mathematicians in academia interested in these kinds of problems, which is a different approach from the "small FAI team" one that you focus on in your post. As another kind of approach, the considerations outlined in AGI Impact Experts and Friendly AI Experts would suggest a program of generally training people with an expertise in AI safety questions, in order to have safety experts involved in many different AI projects. There have also been various proposals about eventually pushing for regulation of AI, though MIRI's comparative advantage is probably more on the side of technical research.
I thought "making math progress and trying to get mathematicians in academia interested in these kinds of problems" was intended to be preparation for eventually doing the "small FAI team" approach, by 1) enlarging the talent pool that MIRI can eventually hire from, and 2) offloading the subset of problems that Eliezer thinks are safe onto the academic community. If "small FAI team" is not a good idea, then I don't see what purpose "making math progress and trying to get mathematicians in academia interested in these kind...
On the subject of how an FAI team can avoid accidentally creating a UFAI, Carl Shulman wrote:
In the history of philosophy, there have been many steps in the right direction, but virtually no significant problems have been fully solved, such that philosophers can agree that some proposed idea can be the last words on a given subject. An FAI design involves making many explicit or implicit philosophical assumptions, many of which may then become fixed forever as governing principles for a new reality. They'll end up being last words on their subjects, whether we like it or not. Given the history of philosophy and applying the outside view, how can an FAI team possibly reach "very high standards of proof" regarding the safety of a design? But if we can foresee that they can't, then what is the point of aiming for that predictable outcome now?
Until recently I haven't paid a lot of attention to the discussions here about inside view vs outside view, because the discussions have tended to focus on the applicability of these views to the problem of predicting intelligence explosion. It seemed obvious to me that outside views can't possibly rule out intelligence explosion scenarios, and even a small probability of a future intelligence explosion would justify a much higher than current level of investment in preparing for that possibility. But given that the inside vs outside view debate may also be relevant to the "FAI Endgame", I read up on Eliezer and Luke's most recent writings on the subject... and found them to be unobjectionable. Here's Eliezer:
Does anyone want to argue that Eliezer's criteria for using the outside view are wrong, or don't apply here?
And Luke:
These ideas seem harder to apply, so I'll ask for readers' help. What reference classes should we use here, in addition to past attempts to solve philosophical problems? What inside view adjustments could a future FAI team make, such that they might justifiably overcome (the most obvious-to-me) outside view's conclusion that they're very unlikely to be in the possession of complete and fully correct solutions to a diverse range of philosophical problems?