It was always like this though. It hasn’t changed. A few days ago it was 1px larger, but we reverted it due to the other theme. Is that when you are talking about?
Still too thin, but I think the reason for that is because it's the "Extra Light" variant (found this out via Firefox's Inspector tool). I would suggest changing it to "Regular" and also change it to 18pt.
Yeah, I tried changing some things but unfortunately no change. I think it’s the font itself being a bit light designed. Increasing weight does not help. Increasing size does not help.
The font is fine as it is. We can't be expected to change it for everyone based on a single piece of feedback. Increase the Zoom level on your browser.