Using softer springs on stock dampers will just result in smashing the bump stops all the time!
We are wrapping up development on our coilover kit for the Y which improves on the stock ride quality and can be run at the stock Model Y Performance ride height, or lowered. They are height and compression/rebound adjustable so you can fine-tune the coilovers to your exact liking
Development took quite a while, but as it turns out, installing parts designed for the Model 3 caused the Model Y to perform far from ideal. You'd think it would be easier considering how many parts they have in common!