I have previously pointed out the Hips issue. Languy99 also pointed out when he did a review on ESS v5.
The default mode is not a good idea for a user who buys ESS 5 and has limited knowledge. If you have the same user getting a license for NIS2012 or KIS2012 for example, the user would not have any problems.
Those are my thoughts on it. Apart from that, ESS/EAV 5 do use more memory than version 4.