My job in RL is kicking in here... backfill. When I have someone on my team leave, I need to backfill that person.
They may have had a person in charge of player relations, giving input to decisions about business models and marketing plans for 1-year, 3-year, 5-year horizons after release. They may be backfilling that person, not creating a brand new position and filling it for the first time.
The key decisions about business models -- how to release DLC, how often, when to do expansions -- can be made or changed while development continues. The key decisions about gameplay -- how to build cities, how to wage war, which yields are used for which purposes -- those should be made already and locked in.