I can nearly say the GUI becomes familiar again with those orange bars and better readability due small changes in the arrangement. Seems that the User Portal also got some rework ? Looks somehow much nicer than in my memory - Loginpage, but also the HTML5 VPN Part in it [;)]
Would love to see some more rework on the Packetfilter too - the new lower sideways scrollbar for moving large entries is nice, but readability in Packetfilter still suffers massively compared to V8 - too much information packed in there. Maybe less texts as "From Source:" or "Going to:" and better separating by some kind of tabs or lines or whatever. A more spartanic view as on pre UTM9 is more familiar and better readable. There's maybe still some work to do, that people keep overview over their packetfilter ruleset...
Beside of that - I really like the reworked GUI, good work !
COMPLIMENT #2 (added later): Whatever you tweaked or optimized under the hood, keep it ! Packetfilter and Webproxy feels somehow smoother and somewhat fast. Working through my ESXi UTM9 VM with 2 cores and 4GB Mem feels somehow speedy as these guys in this video starting from 12min40secs...
http://www.youtube.com/watch?v=B4xFx_O7ux4
