I opened a 7.0.3 project and the load average meter is at higher value than was in cubase 7.0.3 !!!
If this is same in other projects I will be back on cubase 7.0.3 soon … 
I am actually seeing the oppoiste, a slight improvement on a 45 track project with lots of VSTs
Today it works fine … I don’t understand. Maybe something was wrong in my Computer yesterday … 