1. Provide the facility to choose the pages to be ignored at the file selection stage (maybe in the extended file dialog?)
Yes, probably its good to have option to select necessary input pages range in Extended Files Dialog (named as "Choose Files"). Or we can add such option to easily filter pages range in "Manual Split/Merge Dialog". We will think more about it..
2.The content of the pages not easily identifiable as presented, especially if the files to be merged have a similar visual layout
In the future, in "Manual Split/Merge Dialog", we will try to add something like additional unique visual marks for documents and its pages. It might be a simple colored tags for example.
2. The Edit Document List could be filtered so that you can see the pages being merged on a donor document by document.
Sorry, its not clear for us. Please explain more..
On a different note, Tools 6 dismisses itself after the merge but Tools 4 allowed the facility to go back and forth through the options which was handy if the merge did not go as expected as it remembered the file list and you did not have to go through the rigmarole of selecting all of the files again.
Its impossible to have 'Back' feature for tool-runtime in V6. We can add other solution for your case - new feature that may keep input files list (once specified by you) between sessions.
Thanks for suggestions.