I just tested it. And it sort of works.
The only thing thats missing is the possibility hide
hidden fields in mail context
that only works for the last page.
any hints what i should adapt to make it work for previous steps as well?
PS: mail template looks like this
[prev-step-hidden-group][prev-info][/prev-step-hidden-group]
[this-step-hidden-group][info][/this-step-hidden-group]
and the final email looks like this
[prev-step-hidden-group][/prev-step-hidden-group]
so the [prev-info] field is correctly empty but the group around it is shown
the hidden groups from the last step are hidden correctly