They've said this before, and it sounds like bollocks.   It could be that Howe, being a conceptual designer, was only required during preproduction, and TheOneRing.net guys misconstrue this as him having been only imployed for the sake of the map/"meet our Fellowship" video. Certainly, this seems to be very much in the Howe style:   Wouldn't be the first time TORN is way off of the mark.