Danny Murphy and Simon Jordan reckon so as they gave their thoughts on United's chances of making it into the top four.
The German was announced as interim manager on Monday and will take charge until the end of the season.
He has signed a six-month contract, which will then see him move into a consultancy role with the club for two years, subject to work visa requirements.
Whilst Murphy is relatively confident he will improve United, Jordan is more skeptical about the players' ability to work in his system.
"Yeah, I think they probably will, only because the competition isn't great," Murphy told talkSPORT.
Jordan then added: "It depends if he can get his message across to these herberts, because they're good enough.
"If he gets his message across then yes."
Rangnick inspired both Liverpool boss Jurgen Klopp and Chelsea head coach Thomas Tuchel in the early days of their managerial careers.
He is considered to be the originator of modern heavy metal, high-pressing football - similar to what we have seen from United's rivals, Liverpool, since Klopp took over in 2015.
He will undoubtedly bring a clear style of football to the club - something which Ole Gunnar Solskjaer was often criticised for not doing - and United will know exactly what to do under Rangnick.
Whether this can be implemented effectively is a different question.
Many have questioned how Cristiano Ronaldo fits into a pressing system, with the likes of Edinson Cavani and Marcus Rashford perhaps more appropriate.
The same goes for Paul Pogba, who is considered as a 'luxury' player, which may means he and Ronaldo need to get used to sitting on the bench under Rangnick.