I have no problems with reading the text.
I'm finding a hard time believing all these people calling the beta 3 font ugly. Maybe it's my eyes, but it looks the same to me as the beta 1-2 font, I wouldn't have noticed the difference if all the blogs weren't talking about it.
If we had never seen the beta 1-2 font, would people be complaining about the beta 3 font?
The old font was pretty, but I had to strain to read it. The new font isn't as pretty, but I can actually read it (thank you!) without giving myself a headache. Function has prevailed over form, at least in this case.
As Rogi suggested, Apple could add an option during setup that allows a user to pick the font that best suits their eyes. That would let younger folks with perfect vision choose the pretty font that many of us older folks find difficult to read.