Q.Should The Top Of Tree Philodendron Root Ball Be Deep Or Shallow?
My beautiful tree philadendron was looking sick, so I transplanted it although it was late October. I also removed most leaves. Now there are only a few very large leaves left, along with a few very small ones.

Certified GKH Gardening Expert
It should be at the same height it was before you repotted it. Plants need leaves to make food, so it may take a while to recover. Follow the instructions below to give it the best care.
https://www.gardeningknowhow.com/houseplants/philodendron/tree-philodendron-houseplants.htm
https://www.gardeningknowhow.com/houseplants/philodendron/repotting-tree-philodendrons.htm