Also would like to chime in here. Splitting dialog window in two made it harder to read this small font. And to reread previous lines you need to target tiny spot instead of scrolling back like it was before.
I also tried to upscale font. Unfortunately, it looks like it wasn't tested, since text often overlaps, got squished, or scroll appears even when there is still plenty free space. I haven't played in English much, but in Russian it is even worse.