I don't think you need to have extra survival vs creative filters. But i do think it would be beneficial to add 'Multiplayer Compatible'/'Server Compatible' to the categories. Also make sure to allow multiple categories as many packs will have multiple areas.
I think Admin tools should either be renamed to Creative tools, or add that as an additional category.
Possible additions to categories could be, Combat (weapons,armor,etc). I still think magic(mechanics/enchantments) should stay.
Also, what is Nonfunctional!?