Cousins suffered an ACL tear on August 16th. Suddenly, McGee was the only true center on roster, and with limited options and only about a month left until training camp, the Lakers decided to sign Dwight Howard. Again.
Because James, Davis, Kuzma, and Green can all be safely assumed to be four of the five players on the floor to finish games, the Lakers will have an interesting decision to make as to who that final position is filled by. And it may not even be a point guard.
Excitement about Davis with LeBron and having a chance to contend for a title is rational, but expectations should be tempered in the beginning.