Comment:

"The more the requirements are shared (i.e. regional or national scale), the less impact they will have" - it's not clear what the "they" is referring to, nor is the meaning of impact clear. Should we say "The more the requirements are shared (e.g. regional or national scale), the less of an obstacle they will present"? If so, replace with that wording. Otherwise replace with other clearer wording.

Summary:

"they" is not clear