Re-try failed communications with Mailchimp to avoid data loss

After a quick look at the code it seems like this module will try to send data to Mailchimp and if that communication fails for any reason then that data is just lost.

For example in mailchimp_cron() it has this:

<?php
  if ($item = $queue->claimItem()) {
    call_user_func_array($item->data['function'], $item->data['args']);
    $queue->deleteItem($item);
  }
?>

Shouldn't it be something like this (note that this is nonsense code to illustrate my point, not working code)?:

<?php
  if ($item = $queue->claimItem()) {
    $result = call_user_func_array($item->data['function'], $item->data['args']);
    // If the Mailchimp communication was successful then delete the item from the queue.
    // Otherwise the item will stay in the queue and will be tried again later.
    if ($result->success) {
      $queue->deleteItem($item);
    }
  }
?>

So that if something fails then it tries again later so you don't get lost data?

If something continually fails it's up to the admin to address those failure messages.
Also this module could potentially provide a list of items that have failed more than once or something.

It would be also good to have this built into instant communications (when variable_get('mailchimp_cron', FALSE) == TRUE) so that if the instant transaction fails then it is added to the cron queue.

This whole re-try thing could be a configuration option that can be disabled if anyone didn't want it for some reason.