You're not using the term essence in the way philosophers mean it. An essence is a categorical descriptive/reasoning context. In mathematical terms, an essence is a lot like a descriptive/measurement basis. A naive scientist sees a world full of distinct reasoning contexts, length is categorically distinct from speed, which is categorically distinct from water, which is categorically distinct from life. The progress of science has been to progressively reduce reasoning contexts/measurement bases to other contexts/bases thus leading to a more unified theory of nature.

Quantum mechanics does increase the physics reasoning contexts owing to the incompatibility between classical and quantum mechanics. But this is not an in principle divergence in the way that philosophers understand essences. We can describe and reason about quantum mechanics and classical mechanics using the same language and the same descriptive tools, namely mathematics. When it comes to phenomenal consciousness and physical behavior, we cannot reason about them using the same descriptive language. Hence they count as distinct categorical essences until we discover the bridging principles that reduce consciousness to physical behavior.