Having Used PS+CAEPIPE, CAESAR, AUTOPIPE following are my personal views:

Caesar II needs to Improve the Graphical User Interface a lot. The Graphical Input or Output interface features are very limited as of now.

For example ,The output screen in Autopipe allows an user to see the Displacments, Forces etc by Clicking on the model and moving thro the model using arrow keys on the screen. This I found is very useful.

An option to mdofiy the model thro the Spreadsheet or Graphical interface( on screen editing) will be a good value.

CNODE:
For an application Piping Stress Engineer, does it really require to know about a term " Cnode ".
The use of Common Stress Engineers terms would be better.