I was especially interested in a point/thread you mentioned about people perceiving many charities as having similar effectiveness and that this may be an impediment to people getting interested in effective altruism
A recent survey of Oxford students found that they believed the most effective global health charity was only ~1.5x better than the average — in line with what the average American thinks — while EAs and global health experts estimated the ratio is ~100x. This suggests that even among Oxford students, where a lot of outreach has been done, the most central message of EA is not yet widely known.
See here