Thank you for your feedback. We appreciate it.
We will be releasing En Masse v5.0 that we will be having a feature to improve the SEF ability for the merchants. We are aiming for a beta launch in the coming month so please look out for it.
By the way, you could map the URL to your shorten URL using tools like sh404SEF http://extensions.joomla.org/extensions/site-management/sef/10134.
Please also feel free to contact our support department so that we can help provide you with solutions that we already done with many of other users on their SEF needs.