Ecllipse 4.2 - slow as hell

I have just installed the brand new Eclipse 4.2 Juno. It is pretty (who cares!?) but - it is soooo slower than the previous 3.x version I had (Indigo).
Looked up what I can do - unfortunately this seems to be a result of a new UI feature - a user can now use CSS to modify the look&feel. It came with a price though.

I started up with modyfying the eclipse.ini the following way:

-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.200.v20120913-144807
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vm
/opt1/soft/java/jdk1.7.0_13/bin/java
-vmargs
-Xmn128m
-Xms1024m
-Xmx1024m
-Xss2m
-XX:PermSize=128m
-XX:MaxPermSize=128m
-XX:+UseParallelGC

It significantly improved the start-up time and an overall responsiveness.

Still - it is terrible.

Then, I switched to Classic look&feel (Preferences->General->Appearance) and made sure animations are disabled. It has improved things - just a tad.

Anyway, GUI is still awfully slow (switching tabs, editing pom.xml) comparing to the previous version. 

Looked up in the net - seems there's nothing which can be done.

Just to make things clear - my machine is pretty fast:  i7, 8 cores, 8GB RAM, SSD.

The other surprise  - the Content Assists didn't work for Java code!
Seems it was just disabled by default - Preferences>Java>Editor>Content Assist>Advanced... WTF? 

Just downloaded Intellij Idea...