I'm using a retina Macbook Pro, and the differences between the normal font setting and the slightly larger fonts are way too drastic and not fine grained enough.
This is the slightly larger text option, which you can see is just way too big:
https://cloudup.com/cvetiyLhtUI
But it looks even worse when you come to a sortable screen with lots of stats. Many of the stat headers or stats themselves get cut off. Like this:
https://cloudup.com/cupM9Mf9IXL
A few options in between the normal and slightly larger text settings would be great. The normal size is just way too small and causes too much eye strain. So I either have to decide between lots of eye strain (and I'm a 28-year-old guy, so it's not like I have terrible eyes), or I have to deal with text being chopped off and overrun into other elements on the interface. Not good.
I also think this also goes back to supporting higher pixel displays as well, which really needs to be address too. However, considering this is a text-heavy game, at a bare minimum, addressing blurry fonts and these text sizing issues would be a step in the right direction.