It would be nice to have the possibility to mark fields not to show up to the user, but still have them set by the template.
For example:
We have a checkbox 'reported by customer' in our issues, it makes no sense to show that to the user when using the 'customer report' template, but nevertheless it should be set!
[I have created an issue for this, but thought maybe some of you would like to see that too and vote for it at https://jira.atlassian.com/browse/BON-1193]