Hi,
Working with Items I noticed that the Group names could be better aligned. The issue is that the collapsible link (+) is before the title.
It could also be a good idea to make it a bit more subtle / different. I liked the fact that we could easilly identify the collapsible ones (because of the checkbox), and in DW9 I have to pay extra attention.
Maybe it's just me, but some other people feel the same.
Best Regards,
Nuno Aguiar