I don't know how it came to 1D3... anyway, back to the topic...
We should wait and see what this D610 actually is offering over the D600.
If it's a considerable improvement (of sorts, because the spec sheet is very much the same) then I'd be a bit annoyed as an owner of a D600. Not because this D610 takes anything away from mine, but because I couldn't help thinking that it is what the D600 was supposed to be to begin with.
Otherwise it's a marketing trick to clean up the reputation of the D600. It's disputable to claim that Nikon didn't acknowledge the problem: in fact they did, and anyway we will never know what is the % of affected cameras over the total. As such, the D610 might not be aimed at solving a real problem but only a perceived problem that is keeping buyers on the fence. My D600 never had oil issues and I'm now approaching 5K shots.