Rolling back to a previous version of OS X Mavericks
One of my pet peeves with O/S X is there is not an uninstall feature for patches, upgrades and even apps. One of the (VERY) few things that Windows has that I wish the Mac had.

Unfortunately the only real way to do this is to wipe the drive, install the pervisous version, assuming you have the installer or can find it and restore from backup.

What I usually do before a major OR point upgrade is to attach a USB HD and clone the drive. Then I verify it boots from the clone. Only then do I do an upgrade. So if the upgrade breaks something all I have to do is back up the few changed files and restore from my clone.

As for Time Machine, you can't restore an O/S from Time Machine as it does not backup system files. However once you have reinstalled the O/S Time Machine can take you the rest of the way.

Probably NOT what you want to hear but that's the only solution I have ever found...