I really don't see Antiq. 11:1:1 as requiring the complete depopulation of Judea, only an exile of (some --not all) Jews. That passage also refers to their repariation ("he would restore them again to the land of their fathers"), but we know that very many of the Jews remained in the 'diaspora', albeit voluntarily (e.g. Daniel). The prophecies as recorded in Jeremiah do not even require deportation and exile at all: pls cf. Jer. 27:7,8,11-13,17; 38:17,18.
While these discussions are interesting, they really don't lead anywhere. The WTS' chronology is wrong not only because Jerusalem fell in 587 B.C.E., but more importantly, because Daniel chap. 4 has nothing to do with foreshadowing the Messianic Kingdom. See also Luke 21:8.
Have a great weekend!!!