On book font size, there actually is a market solution for the issue: if enough sales are expected the same book (same content) will be sold in different formats, pocket size, deluxe paperback, standard edition etc.

Same for translations, with even books with dual languages side by side.

I find fascinating how the arrival of ebook readers made us rethink how we relate to books, and a lot of annoyances got surfaced only now because there was no comparison point before. My favorite is how you cannot ignore the length of a book while reading it: you can’t pretend not realizing there’s only a dozen pages left and the story must come to an end.