I have noticed the new kiwi hull is a slab sided design to cut down on wave and spray resistance. This thinking is based on the current top Javelin hull and uses racks. All I can think of is this type of development must be a change in rules to allow racks.
Do the briz boats have racks?
I also notice that the UK "cherubs" seem to have modified their rules to become almost 12s!!

Using a chute and extender pole would mean a smaller kite or a very large chute entrance!! That long pole gave a little grief if the water was choppy I suspect.

Great to hear that 12s are on the rebound!! They are awe inspiring to watch.