I believe the tagging system needs an update. At bare minimum it could do with an increase in the amount of tags from 5 to 10.
Beyond that possibly a categorizing system would be great. I submit content from a variety of mediums so I tag all of my posts with 2D, 3D, News, etc as it is necessary to keep them all nicely grouped together. But I feel tags like that would be better as a sort of category system for further sorting. Of course maybe the category system would be redundant with the tag system already existing.
Even so an increase to the amount of tags would be greatly useful. I try to use a variety of tags to make it easy for my patrons to browse through my content to see exactly what they want to be seeing but with the limitation of 5 a lot of my larger scale posts end up missing required tags for my organizational to work.