Hiding options into sections is not a great way of making something more usable. How it gonna help to make list shorter? You still would need to read and check each line, but you'll also need to open each section in addition.
Unfortunately vanilla's resolution 320x200 is still the "standard" for OXC, so we can't fit more things. I think we may try to fit another "section" button at the left (shrink some space between buttons, make buttons 14 pixels tall, instead of 16), and add there "Interface" section, for example. And make all buttons smaller, to allow fitting of more controls. Try to make shorter descriptions, also make dropdown list having descriptions for each line, instead of enumirating all options. I.e. totally rearrange options screen.
Frankly, some of options in "advanced" are meant to be in mods, because they are game-related (like tftd building rules, or damage formula, you name it). Only engine options should stay there. And most of these game-specific mods should be applied without restarting the game, and having proper multilanguage description.
But it gonna be quite an overhaul. And I hardly imagine devs dare doing that