Separate mail sending configuration from Joomla

We didn't do like AcyMailing because we didn't see any need for that and it would have created more headaches than anything else since then the user has to change the configuration everywhere when it changes host/email server.
Unlike AcyMailing, where you might need a specific mail sending server because of the sheer number of emails having to be sent for a newsletter, HikaShop only sent event emails (on an order creation, an order modification,etc) and even send registration emails like joomla does, so there is no benefit in using another sending method than joomla's and it would even be strange to sent the registration emails from HikaShop from one email server and the registration emails from Joomla from another one.

I honestly don't see the need for that.