In our mob generally speaking all crew members sit in the cockpit for T/O and LDG unless other circumstances are needed. Indeed the relief crew take an active part in both pre flight and post flight setups.
We (mostly) fly the 777F as a four-man crew. One relief FO does walk around/courier compartment/catering/hazmat, the other helps with ETOPS/MEL/clearance issues, the F/O sets up the EFB and the captain works the FMS. We can prep for a 15-hour leg in 30-40 minutes.
All four are up front for takeoff and landing. All on headsets, and RFO's do interject when necessary. A go-around can be called from any seat.
It's funny to hear about speculation regarding single-pilot ops. In our newest plane we're trending the other way....