Issue 2. Interesting case. Thanks!
This option exists for advanced users.
1. Go to WebSettings.xml
2. Set ViewsFromBase to false
3. Specify view tree in ViewSettings.xml
It has the new format in SCADA-Web 5 and edited manually in a text editor.
You should be careful, because if user has rights to all views, he can view events, get charts and reports for all the data, event if some views are not shown in the tree.