For each of the main fields in the Metadata (IPTC) panels (i.e. Description/caption, Headline, Keywords), it would be great to have a dynamic character count of the field contents (ideally on the left, next to or under the field description).
The icing on the cake would be also to have a count of number of keywords, as well as of characters, for the keywords field.
That's an interesting idea. I'd be interested in seeing how many others would also find this useful. Upvote the suggestion or leave a comment if you'd also like to see the interface display character/keyword counts.