Haven't tried the 07's but there was a huge difference in outhaul tunability between the 05 and 06's.
I was sailing in squally conditions with an 06 5.2m. In the lulls it was just over 15knots and I had a minimal amount of positive outhaul, planing beautifully. When the squalls came through I had 30knot gusts (checked seabreeze later) so I gave it more outhaul on the fly - ~5cm more. It flattened right out and I was amazed. 5.2 would traditionally have been way way too much for me in 30knot gusts but not anymore.
I tried the same approach with my 05 5.0m but it looked stretched and over-outhauled, with diagonal creases etc.
Downhaul tuning seems to be much the same between the 05 and 06 but with the additional range of outhaul on the 06, the wind range is now huge!
I'm guessing with the 07's Ezzy's just tweaked the 06... read a review stating that despite the claims of an overhaul for the 07s, it seemed to be more small adjustments and a change of colours

. It also said that the feel didn't seem to have changed much.
My mate's getting the 07s so I'll know before too long.