I find new triming tool very cool but now, may be it could be even easier to trim multiple contents if you could see them independantly.

For instance, you would select a content and you would only see it in the preview window to trim it correctly and precisely, then you select another content and you only see it to trim it correctly and precisely. It would work on the content tab.

To see the whole film, may be you could only have to switch on DCP tab, so the timeline with cursor would show the entire film (multiple content joined each other) to preview and check that everything is ok, according to what you wanted to do.