Aralia Plant Losing Leaves

I have had my balfore aralia for a few years and it has grown beautifully. Suddenly a few months ago, the new leaves at the top sprouted then died and fell off. Then one of the mature leaves fell off. I over watered it… So I removed it from it’s pot and checked the roots for rot. Saw none; rinsed roots off and replanted in an appropriate soil. It has been one week and now all leaves are starting to turn yellow and many have dropped. Is it in shock? How can I save it?