Speaking to the old licensing model strictly.
1. I think "intexpflow" means integrated expedition flow. I believe its part of the licenses checked out for schematic capture when you are using the iCDB flow between Designer and Layout.
2. wgpcb is one of the features that gets checked out when using layout 200. I don't have pcbexpedition in my license set so not sure on that one.
3. I think it depends mostly on the flow you are in but the absolute minimum to open Designer is just viewdraw. you'll have other issues but it will open.
4. I don't understand the question.