I imagine that for a lot of us part of the difficulty is just the connection requirements for efficiently going through dozens of observations. Anywhere the interface can be streamlined in terms of the required bandwidth and processing power would be a big help. When it takes several minutes to open an image to get a close enough view to see certain features needed for ID, it’s a limiting factor (I do really wish it was possible to right-click an image to then load just that image in a new tab in the background- sites where I can do that, similar-sized images seem to load a lot faster than they do in the iNat setup where they load as an overlay on the current page that moves around as you move your mouse instead of having scrollbars and whatnot). That said, I wouldn’t be surprised if the site developers have already put a lot of effort into that already, so I’m not sure how much that can feasibly be improved.