I think that the biggest area for improvement is for their core component, the Java Core Server (JCS).

In addition, there could be improvement in the following areas:

• Saperion web client: Does not support many rich-client features and is inconsistent between thin and thick clients
• The VBA macro API was very poor
• No real toolset provided
• No debugging options
• Workflow engine
• No official and supported procedure of deploying/moving a solution between stages, which was officially stated by the vendor