Change formset default from collapsed to exanded?
A simple hook_form_BASE_FORM_ID_alter() invocation can alter the default properties of the form. If you inspect the form array you'll see that the fieldset is stored in $form['subscribe']['subscribed']. By setting the #collapsible element to FALSE, the or #collapsed element to FALSE (if you want to retain collapsibility), the default behavior will be to keep the fieldset open.

For example: 

function MYMODULE_form_support_ticket_node_form_alter(&amp;$form, &amp;$form_state, $form_id) {
  // Replace #collapsible with #collapsed to retain collapsibility.
  $form['subscribe']['subscribed']['#collapsible'] = FALSE;
}