I still think you should use a better font. Literally names right in the same dialog window have a readable one so there's no excuse. Line spacing could also be a bit more than 1 pixel.
Characters might be toned down, but that might be better than overexaggerated caricatures. I'm not sure if this is the correct strategy to show off your game, but it will be more relatable.
It would be cool to have Joe and Vreena speaking turns reflected in the portraits, like the phone getting darker or shifted to the side when Joe is speaking.
Good luck at the gamescom.