Number one thing is that the scope of code review needs to be defined for the team. IMO it's best to scope to a few, key stylistic constraints and have senior e

Number one thing is that the scope of code review needs to be defined for the team. IMO it's best to scope to a few, key stylistic constraints and have senior engineers watch for red flags. Managers should actively tie-break on matters of "premature optimization" because they're actually responsible for allocating the team's time. "Does it work? Yes." should be a veto against any other blockers. Anything more is inviting office politics into the process.