Two issues I observed with saving and loading workspaces:
1. If you have a workspace with merged log files and you closed the original log files in the view to have a cleaner view, and then you save and load the workspace again, the merged log file views are all gone.
2. When you save and open a workspace the order of tree elements changes. This is very confusing if you have a lot of open log files.
3. This is more like a feature request in combination with 2. It would be very helpfull to be able to manually reorganize the order of log files in the tree view.