Sure it does, because that's all nature and beasts. Wicker stuff is merely based on wiccan concepts, and celestial and flower junk definitely coincides with Wicca. As for Dinosaurs;
Nature and plants/flowers fit right in.
You do that by giving them undead bear or cat forms. Not Crypt Lord forms which have their own set of abilities. You also don't give them insect forms because that requires unique animations and the expectation will be that these models have insect abilities.
Also I believe with those forms you start drifting into Druid of the Nightmare territory.
Really? Between Crypt Lord WC3, Anub Arak HotS you're looking at about dozen abilities. You could easily add Venomancer, and Mantid to the mix as well, since the entire design space for a class utilizing insectoid abilities is wide open.
Druids would be an issue because you have to make unique forms for each race. That would take a considerable amount of time, and some races simply don't line up with Druid lore, like the Forsaken.