The team now have an employed project manager, which is a step up. He works for the volunteer organisation. I don’t think he’s there to administer the group - it’s still all volunteers.
The new building is for restoration and long term storage. After a quick google for Duxford Masterplan, you can see more of what they are planning published on the Internet here: https://museuminsider.co.uk/wp-content/uploads/2015/08/IWM-Duxford-Masterplan-Appendix-6.pdf
You can see the revised Duxford layout in the planning docs, which is interesting in that context.
If I’ve understood it correctly, the vehicles and land warfare exhibits will be distributed around the site, creating zones and making more of the large objects - combined aircraft, vehicles and artillery in context with each other.
The airliners then move to where the LWH is now, clearing the space at the centre of the site so it’s more focussed on being a war museum (which makes the most of the wartime buildings and airfield).
Alas the tank running area seems to have gone. I’m hopeful that will come back, as Duxford is one of the few places you could really see things moving, ground and air. Separating the restoration and long term storage into the new building would also make a running area a lot more attractive as a visitor attraction.
It’s worth checking out the IWM corporate plan here:
I’ve no idea what vehicles (if any) will be moved, stored, or recovered by owners. I’d suspect it’s way to early to tell.