Read here blue post about seson 8 delay

for those who have not read this yet:
http://blue.mmo-champion.com/1/22748958184-yo-why-delay-the-arena-season.html

Q u o t e:

Question:
why delay arena season 8?

Blue Answer:
Because information in the next minor content patch is needed to start it and the patch is not out yet. Are you pretty comfortable with the new resilience change already?