Oil leak

My brand new Hyundaii Santa Fe 2011 had an oil leak. They initially said it was the oil pressure switch but when they got it in they saw that the leak was from the OP switch housing. They had to pull out the intake manifolds, coolant cross pipe and cooling housing section. They found a "nick" in the OP switch housing deck. They had to replace with a new gasket and reburnish the intake plenum deck. They used flange sealant and replaced all the parts. My question is about how major of a problem this is and what the long term implications are as well as if this really fixed the problem.