The biggest open questions are:
1) In general, how can we build a community that is both cause impartial and also representative?
2) If we want to aim for representativeness, what reference class should we target?
In terms of representation then my own opinion in relation to the animal welfare cause area is that it could relate to moral theory. At present the dominant ideology (rational pragmatism) favoured by many utilitarians has functioned as a way for people to associate with one another, and offers a fairly easy way to become part of EAA through adopting certain organisations and ideas. This is an ideology which in my view has been dismissive of rights based approaches by diminishing their value / relevance to effectiveness thinking.
To address this issue i believe rights based thinking ought to be valued and represented at various levels rather than dismissed in favour of the preferred ideology. This isn’t to say anything about which organisations or approaches are “most” effective but dismissing moral theory in favour of an ideology seems to be weak at both representativeness and integrity (particularly where it hasn’t been agreed upon but is more unilateral).
I tend to think that addressing issues of representation in cause areas will have better follow on results in the community at large (informed from below rather than from above). However, the problem here is that unrepresentative cause areas are more likely to be resistant to representation, because they are likely to gravitate toward that norm rather than away from it unless significant efforts are made, particularly where it has become institutionalised. Whilst it is unclear whether some EAA leaders would think that a lack of representativeness (as i am stating it) or plurality would be a bad or concerning thing anyway as it can instead be associated with increasing utility, particularly through simplifying the cause area.