I can only comment on what I have seen, and that is that there is a good deal of redundancy within the community. So much so infact that it leads in some cases to direct competition between elements within the command. Of the four I have had the priveledge to deal with, three of them seemed to perform quite similar functions down range (granted at different skill sets). It tended to turn into who could plan the quickest and whose "turn" it happened to be. As previously mentioned before I'm sure the Corps group are top notch, but not very neccessary considering the capable SOF at hand.
Then again I'm just a B.S. artist....