I have PW and I'm compering the fonts which I'm using in all my ebooks sold at
www.knygute.lt
The font is DejaVu Sans based and is a bit thicker than original DejaVu Sans.
I know all about font tweaking and yes, it does not help with this version of Cr3 on PW.
So I'm using now CrazyCoder's Cr3 on my PW and waiting for this version fixing.