Most of my Kindle books are in the bottomless pit that is my "Free" Collection. I don't go in there much.
To be honest, though, so what if it does take a bit longer to browse? I spend way more time actually reading the book, it just might take a couple of minutes to choose which one if I haven't already decided before I look. It's no worse than browsing in Calibre, or on Amazon, or in a bookshop or a library, surely?