After winning their opening two games, United head into back-to-back fixtures with Portuguese challengers Braga knowing six points will confirm their place in the last 16 with two matches to spare.
"It does help the league form if you can get through early," said Carrick.
"The manager can change things around. He can rest players. He can use the squad and give players game time.
"The pressure is off. He can start planning ahead knowing the next stage is already secure.
"It is not always possible. Sometimes it can go down to the last game, which in itself is not always a bad thing.
"Overall though, it is better to get it done and dusted."