One thing that constantly annoys me about Logos 4 is that if I want to close a tab (i.e. a resouce stacked over another open resource) I do not have the option of clicking on an x on that tab, but I have to move over to the very corner of the resource and hit a close tab x there.
For me it would be much more natural to hit an x on the tab, which would also mean that I could close a resource that was not at the top of the stack without bringing it to the top first.