Just as an update, yesterday I was playing my DK2M and thoroughly abused the whammy bar as if it owed me money. I could pull it sharp about two full steps (I probably could have gone even sharper but I was paranoid about breaking a string, even though the guitar itself wasn't giving me any indication that I was in danger of that). I dive bombed until the strings stuck to the pickup poles. Lather, rise, repeat. When I checked it with my tuner today I was surprised to see that my low E had gone the tiniest bit flat and the high E the tiniest bit sharp, but that was about it. Rather impressive. So do I feel the need to immediately yank the JT580LP out and replace it with an OFR? Nope.
What I do desperately feel the need to do is fix the intonation. That's going to drive me a bit crazy. I don't know if I want to get a trem stop and then do it or just figure out another way to block it temporarily.