Valkrionn
The Hamster King
Do you really need that many tags? Can't you just clone the Great Person tags so that buildings would have something like "+2 Animal" or "+20% Adventurer"? Of course the icon would be replaced by the spawning icon.
EDIT: Wait ... those are the 15 tags you are talking about. Nevermind. :/
For the most part, yes. Doing a straight clone of the GP system would work for some civs (Grigori), but it would remove the random spawn mechanic, and have far too few modifiers.