Hi,
The menu is consciously not there. The reason for that goes as follows: by default in Morphic every window gets the generic menu that nobody really uses, but some windows also put in there dedicated menu entries like the "show previous contents" from the old Workspace. The problem is that you have no chance of knowing which window actually hold useful entries from outside.
That is why in Glamour you have to have a window specific action in order to get the menu at all.
About save/load, this feature will come in some form.
About the tabs: every presentation that has a title is shown like a tab. It is actually true that we would like to have multiple tabs, but we did not get to a proper solution yet :).
Cheers,
Doru