For now, are you aware of the compressed display option that shows (I think) 200 items/page? It's the icon under 'View as' that looks like a stack of papers. I'm not finding that option when I use portrait view, tbh, but in landscape view it's at the upper right above the list of results.
[Edited to add:]: You can manually choose the compressed display of search results by adding to the url:
&view=1
Actually, maybe you can't. I use a Kindle Fire with Silk browser, admittedly a niche user. I've begun using portrait ("phone") view for some apps, but have not applied that to EYB until today. Do not care for! It seems to have fewer features. Had no idea just rotating the device would change so much....