My vision is not as good as it used to be and I occasionally have to squint to read tooltip text at a glance. The UI and fonts are in general very clean and easy to read, which I appreciate (you should lend your UX designers to Paradox), but an option for larger or bolder tooltips would be great. Larger text in general would be a nice option, but I think it's fine as-is, at least at the resolutions I've played at.