Found a way to give feedback on the rendering technique change.
Go to this link:
http://support.microsoft.com/common/survey.aspx?scid=sw;en;1076
At the base of the feedback survey there is a section where we can tell them about the issue.
This will likely be our best bet of getting the text rendering improved, or maybe even ClearType support for the new products.
Thanks to @WindowsSupport for providing the link.
If we can get enough people sending feedback on the issue, we may just get this fixed.
I'll post this on a few other posts, I will miss heaps so if your up to it, post it wherever you think it'll help.
I submitted a message with a link to this topic, but at this rate, I've lost hope. Windows 8.1 is nearing final release soon and I don't think we will see a fix if it's not coming in the 8.1 patch.