Cush
The center main is legal, but the rules are being loosened to simplify the mainsheet system and give you less 'string' in the boat, should you wish. Also the new system (split tail) will allow the main to be sheeted to the center line without excessive leach tension in light airs.
The kicker will be allowed to be 8:1 as well.
These need to be approved signed off by the international committee first so until that time unless you really want to change I'd wait and see how it shakes out.
Trevor