1)
What is "me'Eretz Mizrach ume'Eretz Mevo ha'Shamesh"?
1.
Radak: It is from east to west. Yisrael are scattered in all settled places!
2.
Malbim: The 10 tribes were exiled to the east, and Yehudah and Binyamin to the west. Not only will they not be exiled again - further, those cast off to the four corners of the world will return 1 .
1
This dispels the third reason why Bayis Sheni was small in their eyes. (PF)