I'd like to chime in with my own thoughts.
At first glance I liked the old look better. But I suppose that is because I got used to the old panel (you know, inertia to change). As I use the beta panel more and more, here's what I think:
PROS:
+ bigger graphs and cute graph history
+ cleaner host jobs list
+ advanced profile config is separate page
+ console and network tabs combined into Remote Access
+ display groups !!
CONS:
- dashed border of bandwidth pool bar
- no bandwidth bars for individual nodes (regardless of the pooling, methinks having quick info about individual node BW usage is a must)
- no host load data
- no cpu time used
- node profile selection is dropdown instead of having them all shown with Boot Into (or Reboot for current) buttons.
- inactive Linodes tabs (Dashboard, Remote, ...) should be more clearly separated
- oh gawd please get rid of that fluorescent green! Oh, my eyes!
$0.02