Thanks, all. Yes, I did ask if they could split the segments (very nicely, I might add) but that seemed to be a deadend. Meanwhile, waiting for the call back, I reached out via twitter and DL hooked me up. I have to say that the 3 times I've used twitter to get help, they have really gone above and beyond. We're in 5 seats together and DL didn't even split the segments.
When I booked these flights back in September via KE Skypass, our seats were all "preferred" (not sure why but they were...I have no status with DL). When the flight schedule changed and I called DL to rebook we were downgraded to regular economy seats and scattered. So with the twitter update we are back in preferred. All our other segments for the trip are also in preferred.