Right now, if "Show lexicon across many smaller pages" setting is on, nothing is shown the main Lexicon page besides the bar of letters (If I didn't do something wrong).

For the main page, there could be a summary of all letters. A good example is in here: http://www.ilknokta.com/yayinevleri.html
It isnot in English but it gives the idea. They made it like, first 5 items of all letters displayed and a More button added.