To estimate Moody's adjusted leverage trend for VERBUND AG in 2022, we analyze the company's Debt-to-EBITDA ratio over the two periods. 

1. **EBITDA:**
For the period 2021-01-01 to 2022-01-01, the reported EBITDA was 1,578,959,000 EUR.
For the period 2022-01-01 to 2023-01-01, the reported EBITDA increased substantially to 3,160,679,000 EUR.

2. **Total Debt:**
At the end of 2021 (2022-01-01), the Total Financial Liabilities (Noncurrent + Current) were 1,834,155,000 EUR + 1,462,453,000 EUR = 3,296,608,000 EUR.
At the end of 2022 (2023-01-01), the Total Financial Liabilities (Noncurrent + Current) were 2,844,559,000 EUR + 1,109,297,000 EUR = 3,953,856,000 EUR.

3. **Leverage Ratio (Debt / EBITDA):**
For 2021, the unadjusted leverage ratio was approximately 3,296.6 M / 1,579.0 M ≈ 2.09x.
For 2022, the unadjusted leverage ratio was approximately 3,953.9 M / 3,160.7 M ≈ 1.25x.

Even considering standard Moody's adjustments (such as adding net pension provisions or subtracting available cash), the significant doubling of EBITDA (+100.2%) far outpaced the growth in total debt (+19.9%). As a result, the leverage ratio markedly decreased, representing a strengthening of the company's credit metrics.

<answer>Improving</answer>