yesterday I flew the Skoop 10.5 (14.3) in very light winds on the beach. It still had the bridles on it.
I was really amazed. It was a little faster and faster in turning than my AB8.4 without bridles, and as powerful as my AB11.8. Both airblasts are from 2001.
I haven't tried the X2
but I believe it will probably feel a lot more like airblast-alikes. If I read that with the X2 you must be carefull not to put too much tension on the back-lines, that sounds just like what was advised for the airblasts.
I think it is very good from Naish to go this way, I personally prefer the airblast feel over the naish feel.
I also flew a Slingshot 14 yesterday. It was slower than the skoop, turned also slower. And had more of a Naish-feel in the bar. Musch more pressure on the backlines.
Both kites looked _really_ well constructed.