Issue custom field visibility per workflow
It's good if custom field could be make visible per role.
In my company, we have create some custom field that is strictly related to developer activity (for example: "Has patch", "review", "keywords", etc). Our reporter protest because they see more fields that aren't interesting... and now adding custum field is suspended...
ps: I know that this is very trivial, but in the "real" world the person are very boring