Olsen is the last of the "scholars" I'd recommend since often he presents his opinions like "my way or the highway" as if only his vision is the right one.... but anyway, that is also going off topic, it has nothing to do with filling the gaps with landscape in lotro.
I read above some nice Forodwaith talk, and I'd be even more interested to explore that after Umbar (because going linear Harad would be 150). A Tales of Yore could even take place, if we read the first paragraph here Northern Waste - Tolkien Gateway