RBC/LDC...
Basically they have further centralised the construction work, Everything gets pushed out of HQ and then implemented by the LDCs in countries. They are trying to get much of the oversight work done by full time people so that things can happen without depending on the availability of volunteers at fairly senior levels.
More work is being done by outside contractors.
On the ground, grunt work is still essentially the same people who did the RBC stuff but more of the overseers are Bethel workers.
Of course, part of the reason is that now the WTS has done an asset grab they need to have tight control of exactly who gets to have a new hall. They are also moving to bigger projects where outside contractors are more usable.
The RBC setup still allowed for too much autonomy so they have closed that loophole.