Specifically, two things.
The ability to change the width of the column showing the comments so they read with more than 5 words per line. I don’t really understand why this isn’t already a feature given all the various screen sizes and resolutions to accommodate. Cramming everything into a narrow column just doesn’t make sense to me.
Secondly, and arguably more importantly, padding around the text. It’s so freaking ugly to have text crammed up to the edges like that, not to mention objectively horrible design (unless maybe you’re making a pamphlet about claustrophobia, but even then). I’d prefer the option to control that padding, but even just 1em or so by default would be really helpful.
Not to be overly dramatic, but it actually makes me physically uncomfortable to look at it. Every time I look at it, I seriously have this inexplicable need to get up and stretch my whole body. Sometimes I get this flash, like my life depends on kicking in a door, shattering a window, or smashing through a wall. And I don’t have claustrophobia.
Point is, that’s some cramped text in a cramped little column, and I can’t do anything about it. Which means what would otherwise be an extremely useful feature is completely useless to me. I will never use comments like this.