I think the next release from Atlantic records should be the release of Scott and Eric from that contractual prison they're in.
I agree that Only Dying would have only fit on the Core album. Sound is way too different from anything they've done since. In fact, if they released it today I don't think it would do very well. Today's crowd doesn't go for that sound at all anymore.
A return to the purple/no. 4 sound would be welcomed. As much as I love a lot of songs on SLDD, they need to stay away from that sound for a while.