I dunno - that doesn't help anything with the layout. I still see overlapping text, tables with crooked columns, bad spacing between paragraphs and titles. The kerning got better, even though there is still something wrong with the stroke weight of the font. Maybe its just a really bad font, and not something related to Sile. Choosing a bad font to showcase a typesetting system is a bit of a redflag imo.
I think the font choice is a lot of it, at least. Sile may be a great typesetting system technically, but the examples kind of look, well, like they were put together by someone who maybe doesn't know much about good layout and typography.