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.
Among other things I was the person who designed the website, so am really happy about feedback on this.
When it comes to classifying the design-language that I used for EA Global, I think minimalist fits quite well. I don't think using basic background imagery, especially if it's the only visual element on the page and is clearly related to the brand identity, would count much against a minimalist style. In general the usage of images is limited, and the whole style is monochromatic (with some very exceptions) to put full focus on the UI elements.
In particular, if you scroll down on any of the content pages, you will find a complete minimalist style, with a complete absence of distracting elements and a strong focus on content.
Is there actually anything that you would change about the website? In particular the comparison with .impact doesn't really work, since that page doesn't really have much content, and also kind-of fails in its navigation because of the absence of a navbar or any other classical navigation element
(e.g. I definitely didn't expect the team link to actually go somewhere on the .impact page, but expected it to be an external link, since the page itself communicated a one-page design without any hierarchical structure. This is added to by the absence of breadcrumbs or other hierarchical context element on the teams page and other sub-pages. I feel like in this case someone took the minimalist idea too far and actually removed important UI elements from the page.)