New to CFB 27:
More detailed Global Coverage Adjustments.
You can now tell your defense to play Conservative, Aggressive, or Ultra Aggressive.
Conservative should help keep defenders in position and limit big plays.
Aggressive allows defenders to challenge routes more aggressively and make more plays on the football.
Ultra Aggressive appears to be the highest risk, highest reward option, giving defenders more freedom to attack routes and look for turnovers.
The biggest thing I'll be watching is whether each modifier has a meaningful tradeoff. If so, this adds another layer of strategy to defense instead of everyone playing coverage the exact same way.