@tekkasit: Unless you're using an ft override, absolutely *nothing* changed, so downgrading won't change anything. If you *are* using an FT override, then, yes, there may have been a very slight performance loss (the extent of that performance hit probably varies between FT configs and fonts, and the root of that issue will get fixed by the FT guys in the next few weeks).
In any case, you can downgrade easily, just install the previous version on top of the current one, no need to uninstall anything

.