Then I'd separate multiplayer into a separate, evergreen project with a continuous revenue model (through premium subscriptions, cosmetics, whatever) that receives constant content, feature, and balance updates through the life of the console until it is no longer technically feasible, delivering campaigns on normal production cycles as lower-priced add-ons to a base product. The AAA "complete package" model is actively harmful to players that enjoy older projects. The constant cycle of "the new game is coming out, guess the old game is never getting a playlist update ever again" is awful. Treat multiplayer like a sport. Variety is added by the constant drip of new content, whether that's new maps, new meta features, new gameplay elements. Hitting the reset button every three years is counterproductive.
It would almost be like a modern, sustainable product that learned lessons from the most popular single-studio multiplayer games today.