Refactor Normalizer to improve readability

The following discussion from !205247 (merged) should be addressed:

• @Kasia_Misirli started a discussion: (+1 comment)

  @avielle This method has grown quite complex with the matrix interpolation logic. Is this change time sensitive? If not, can we consider extracting some concerns into separate methods. WDYT?

Normalizer has technical debt involving the unnecessary use of a block, which makes the logic flow harder to understand. We can refactor the class to have a clear, readable flow