I'm not sure I have as good of a handle on the broader EA ecosystem as others, so consider my thoughts provisional, but I'd suggest adding
A special subset of low-status blindness: there's a bias toward more conventional projects that are easy to understand, since it's easier to get affirmation from others if they understand what you're working on. (Lifted from Jaan Taallinn's Singularity Summit 2011 talk)
I suspect EAs may prefer going down the nonprofit route, which seems very noble, but more overall long-term utility may often be produced by starting a for-profit business. E.g., Elon Musk is one of the most effective EAs on the planet because he did decide to go the capitalist route.
I'm not sure whether to add basic research stuff or not- the QALY is a pretty creaky foundation, but I grant there's a lot of uncertainty as to how to improve it.
I think a very good heuristic is to look out for current social taboos. Some examples that come to mind:
Psychopharmacology. There is still a huge taboo against handing out drugs that make people feel better because of fears of abuse or the simple 'immorality' of the idea. Many highly effective drug development leads might also not be pursued because of fear of abuse.
End-of-life suffering, effective palliative medicine and assisted suicide. A lot of extreme suffering might be concentrated around the last months and years of life, both in developing and in developed nations. Most people prefer not to think about it too hard, and the topic is very loaded with religious concerns.