>Game development is in the dictionary definition of the mythical man month.

this isn't a too many cooks situation. There's definitely enough separate work to establish separate teams specializing in various aspects. graphics, editor, input AI, etc... There are dozens of features in an engine that can all be a full time job for a dedicated team of engineers.

also keep in mind the actual wording of Brooks law:

>adding manpower to a *late* software project makes it later

This is very much a long term thing, not some game in crunch launching next month