In both mobile and web clients it would be very helpful to edit several nodes at the same time. I mean, now you can search/replace and delete them, but it’s even more important to be able to move them together (drag’n’drop), to add or remove tags and to add or remove dates. If there are such things, they should be allowed to be edited together. Just imagine a list of Movies, and you decided to create a set of tags for each genre. If there are hundreds of them, it’s nearly impossible to edit their tags manually, row by row. GTD has the same problem - you just cant’ move or assign dates or priorities for several “tasks” at the same time.