True nature of druids
In my mind, making friends with animals goes to the heart of 'druidism.' I totally missed 3.0 3.5 4.0 and Pathfinder, but in the old days, I don't remember that Druids got wildshape. Now that seems to be the main class feature.
We can argue what being a Druid is all about, but I would also like to make a plug that calling animals to your aid should be a main class feature. Now that doesn't seem to happen until 5th level with Conjure Animals. That spell doesn't sit right with me either since the animals aren't animals but fey.
My preference would be to replace wildshape with some sort of 'call animals' that would increase as you level up (like wildshape) and would be up to the DM to determine what's available in the environment. If not replace wildshape then it could be another circle choice. Make wildshape a spell maybe.