Very well said.
The advice above to purchase new ticket and seek reimbursement from the carrier at fault is (to put it plainly) wrong, stupid and very risky - most likely the reimbursement will not be entertained. In the recently discussed matter with EW and a NUE-FRA-NRT itinerary there would be no basis for asking EW to reimburse when the OP this far out was offered a rerouting.