+1 for manual control over Collections list organization. Collections are at the core of my DAM (Media Pro) workflow. For example, I use collections (aka Catalog Sets) to maintain 100s of web galleries for nature/wildlife whose taxonomic hierarchical structure mirrors the galleries on my web site. I also use collections to segregate various other types of collections of images (stock vs client vs personal use). In Media Pro I can modify (rearrange/add/remove/edit) the collection items easily and can manage the hierarchy via drag and drop.
Of course, going hand-in-hand with this request is the ability to manually change (and have PM+ remember) the order of the images within a Collection (this has been requested
elsewhere). Regular (non-smart) DAM collections are by definition
manually curated groups of images; being able to control the organization/order of both the list of Collections and their contents is a necessity. For ease of use, drag and drop is preferable to a menu driven "move" function.
Regarding "drag and drop"...
I know Kirk has stated that, as a matter of design philosophy, PM+ currently shuns "drag and drop" (favoring menu-driven moves). I understand the motivation for this philosophy, especially for the case where dragging and dropping groups of thumbnails into the wrong folder can create headaches—or disasters if the action can't be undone. Perhaps PM+ could adopt a compromise, such as a
selective drag and drop philosophy wherein drag and drop is prohibited for the most disaster-prone situations (e.g., moving thumbnails into folders) but allowed for less-risky situations (e.g., manually sorting thumbnails within the current Contact Sheet and/or Collection, and of course, manually rearranging the items in the Collections list). I think the rules for selective drag and drop could be fairly straightforward (e.g., disallow dragging/dropping between the Contact Sheet area and the Organizer area), but perhaps this would be technically difficult to implement, or might create even more usability problems, in which case I'd have to suggest that Camera Bits rethink its current "no drag and drop" philosophy and allow drag and drop universally in the interest of greater usability (acknowledging the risk for certain situations).