You are posting about an issue which interests me as well. I was about to post something related, but it fits better here:
I am double-booting EnOS with Kubuntu, and Ubuntu has a far superior font handling in all applications. I am frankly jealous, because I like EnOS more. It’s best seen with a firefox instance.
Could you try (K)Ubuntu and see if it fixes your issues partly or fully?
And if you can confirm: How can we get the Ubuntu font rendering transferred to EnOS?