It would nice if Chrome separated 'DOM write' permissions from 'DOM read' permissions. AFAIK, today extensions can't request only 'read' permissions.
Yes, I understand that it's a pain for new Chrome developers to have to understand the permission system among other things. I liked the easy ACLs of Chrome when I started.
So maybe they could allow permissions to be written in two different ways in the manifest file? Today's quick-and-dirty coarse-grain permission system would co-exist with a fine-grain permission system that would use new directives.
I'd love to prove to my users that my extension is in fact not malicious.