Like everyone else I'm sorry to see Ron side lined, however I'm guessing Zak will not have the same day to day hands on with the race team as Ron. The appointment of Jost Capito alongside/above Boullier by Ron earlier in the year should mean that the F1 race team functions more like other big teams with all the design, build and trackside operations at arms length from the main parent board.
This may even be a good thing as it should refocus the efforts of the F1 team on to satisfying targets set by others. I'm starting to form the opinion that maybe Ron was too close to the day to day F1 operation that he was unable to successfully delegate enough of the responsibility for team members to step up and own, let alone solve, awkward and long standing problems.