At first glance it looks like she's a replacement for Loretta Tomasi, who stepped down as Chief Executive at the end of 2013.
But no. Read on.
John Berry, currently the Artistic Director "will lead the executive team, as well as continuing to lead on the company’s ambitious artistic programme". So this change places him in charge of everything. As Executive Director, Götz will only be responsible for operational matters.
Whether or not you think Berry himself is the cause of ENO's artistic and financial malaise, there's no question he has failed to resolve it. Will the increase in his powers make things better or worse? Guesses welcome.