I think that the current UI for the expert field template is very confusing because you have lots of fields that you probably don't need because the corresponding checkbox isn't checked.
That was the reason for writing a small patch which adds the
#states to all wrapper fields.
Before the patch was applied:
After the patch was applied:
And here you can see how it looks like when checking a checkbox:
|#4||Screen Shot 2013-03-05 at 00.04.54.png||140.3 KB||yannickoo|
|#3||Screen Shot 2013-03-04 at 19.51.02.png||61.87 KB||swentel|