Moody’s adjusted leverage is typically assessed using a debt-to-EBITDA style measure, with adjustments. Using the provided data as a proxy:

- EBITDA increased from €1,428 million in 2021 to €1,505 million in 2022, an increase of about 5.4%.
- Financial debt/liabilities increased materially:
  - Other noncurrent financial liabilities rose from €4,322 million to €5,867 million.
  - Other current financial liabilities rose from €746 million to €1,022 million.
  - Total current + noncurrent financial liabilities rose from about €5,068 million to €6,889 million, an increase of about 35.9%.
- Cash and cash equivalents also increased from €964 million to €2,584 million, so net financial liabilities rose only slightly:
  - 2021 proxy net debt: €5,068m - €964m = €4,104m
  - 2022 proxy net debt: €6,889m - €2,584m = €4,305m
  - This is an increase of about 4.9%.
- Net debt / EBITDA proxy:
  - 2021: €4,104m / €1,428m ≈ 2.87x
  - 2022: €4,305m / €1,505m ≈ 2.86x

Because the debt-to-EBITDA proxy is essentially unchanged, with a very small improvement due to EBITDA growing slightly faster than net debt, the best classification is Stable rather than clearly Improving or Deteriorating.

<answer>Stable</answer>