What I’d like to see:
Tagging for multiple items at once by typing the tag rather than drag-and-drop. Perhaps use the preview pane (when there is one) to show any files selected in icon view or mini previews, and just use the Tag Bar.
Tagging by keyboard should prefer the “Tags” auto-group thingy rather than pre-existing groups with subgroups that match the tag being attempted.
Tag view should condense identical named tags.
Tag view should provide some mechanism for seeing related tags. As it is now, it’s uncertain what tags will refine the selected files and what will return no intersection. Venn diagram, highlighting or dimming tags, or a web diagram would be nice to navigate from one file to another.
The ability to count Tags in List view or Smart Groups. I have a lot of images that I’m trying to sort, and I want all images to have at least X number of tags. Give me a way to find out which meet this criteria. I’ll give you bonus points if you can show which tags are inherited vs which are manually added.
There needs to be a means of not creating duplicates of replicants to the same destination. If I’ve already Tagged something X, drag-and-dropping it to the Tags/X folder with Command-Option held creates two copies. I can see that the item only gets tagged once with X, but if I changed my mind about the X tag, I really don’t want to fight the system in trying to remove it.
Auto suggestion of tags while typing should NOT change the case of my typing. If I have ONE tag that starts with a capital letter and that’s the first or the alphabetical top result, I spend quite a lot of time cursing auto-suggestion. My recommendation would be to only change the typed text if an item from the list is selected.