Hi dagrev, thank you for your feedback. We use standard Android notifications, so you might try to make the fonts in the whole system bigger. Although on my Nexus 5 the notification fonts stay the same, it might be different on your phone. It's in System settings - Display - Fonts.
We might think about a custom notification layout in the future, to make the information more visible, but there're other problems connected with it, like different phone manufacturers putting different backgrounds in the notifications, which causes the "custom" notification to look out of place and not fit well together with the system UI.
Ondra