From a business perspective, legal documents prepared abroad will be an advantage assuming, of course, that they are (a) cheaper than those produced here (which is the whole point of outsourcing them) and (b) that they are of a comparable quality to those produced here.
Legally, there should be no difference between documents that are prepared in the United States as opposed to those produced abroad (again, assuming that the foreign lawyers are competent in US law). There is no need for the court to ever even know where the documents were produced.
So, from a legal point of view, these documents will not give any advantage or disadvantage. The only advantage that will come of them is financial because they will presumably cost less.