First, I wanted to thank all of the Effective Altruism Global organizers and participants. I found it to be very valuable and overall well put together. There was obviously a ton of work put into it, most by conference organizers who I don't believe will get that much credit for it, and I very much commend their work.
That said, there's always a lot of room for new ideas, and I find I often get a bunch of ideas at and after these conferences. Because of the EAGx events, ideas described now may be able to be put into action somewhat soon and experimented with.
As may be expected, I recommend that people make all of their ideas be independent comments, then upvote the ideas that they think would be the most useful.
A bias for expected value calculations in (most) talks
I (somewhat obviously) have a large preference for numeric estimates. I strongly prefer when people presenting their organizations give cost effectiveness numbers in their talks. That said, for the few talks I have seen at EA conferences, I haven't seen this that much (still much more than other conferences, but that's not saying that much.)
I would find it very interesting if there could be a standard for most talks proposing or discussing some program to end their talk with some cost effectiveness values or standard types of quantifications.
I think there's a risk that explicit computations might lead both your audience and yourself to overestimate your own confidence.
Moreover, doing them in a way that's well-calibrated to potential sources of risk and error is a skill, and I wouldn't want to suggest to people giving presentations either that they should make something well out of their field of expertise an important part of their talk, or that they shouldn't give a talk if they're unable to accurately compute EVs for the things they suggest.