According to the dashboard, they are not planning to be fully staffed in the Control center until July 2024:

https://cdn.mbta.com/sites/default/files/2023-02/2023-02-01_sd22-6_cap6_redacted.pdf

That is crazy - we have another year and a half minimum of reduced schedule trains (after already dealing with this for a year).

At least they're transparent about how badly they've fucked up.