Description of problem: Font rendering changed in Fedora 20 (freetype 2.5.0) and is worse, IMHO, than previous Fedora releases.
freetype 2.4.11 (F19): http://i.imgur.com/TiAaFzX.png
freetype 2.5.0 (F20): http://i.imgur.com/vyCUUUX.png
Both images are from a F20 box. The problem is not isolated to LibreOffice and affects every application.
Version-Release number of selected component (if applicable):
This was an intentional change. Freetype's upstream decided to disable the old CFF engine by default in 2.5.0. It was replaced by the new engine written by Google and Adobe.
See http://lists.nongnu.org/archive/html/freetype-devel/2013-05/msg00061.html, http://lists.nongnu.org/archive/html/freetype-devel/2013-06/msg00027.html and http://lists.nongnu.org/archive/html/freetype-devel/2013-05/msg00000.html.