Q: Logic Pro X works only on 2 CPU Cores! Why? They have to fix that! FAST!

I have a 8 Core MacPro, but Logic Pro X uses only 2 or sometimes 4 cores. But this very extensiv. So the playback always stopps! I was thinking they fixed this problem in Logic Pro X, because i still had it in Logic 9. THEY HAVE TO FIX THAT A.S.A.P.