Sorry it just seems so wrong with the bits we know about it. Beleriand was basically a westernextension of lindon (as it existed SA onwards) not a northern one - you cansee if you compare the Beleriand map at the back of the Sil with the UT/LOTR Middle earth and line up Himring and the remnant of the Blue Mountains. The Map in the UT clearly shows Numenor as a star.
Having done a close up it also seems that the Shire and it's environs has spread across all Arnor. So while I appreciate a lot of things have to be placed speculatively relative to descriptions, other things we know about, didn't move and really could be more accurate.... in my opinion...
And Legate ..you should count your blessings on that score