Something crossed my mind after re-watching "Year of Hell" recently. After the Voyager crew became successful in shielding themselves from the Krenim's weapons and temporal incursions, she orders the crew to abandon ship. She must have shielded the escape pods from the temporal incursions or they wouldn't have existed if Voyager failed the attack later. The question is, what happened to that crew? If they were shielded as I assume they were, Janeway didn't go back for them because she didn't know about them.