Reading the reviews is eye opening and rather saddening. It's all about the dust/oil or whatever 'it' is, and it shows up on the 4-star ratings that say 'don't buy' - which is rather odd that they give it a '4 star' rating, but that's another story.
If you have some spare time, and really who does, the low review is really lower than the stars shows, and that's a pity.
I kind of ask myself why should I care, then I think, well, I have a boatload of FX lenses that I'd like to get the rest of my lifetime's worth of use out of. That's why. I have a D7000 that takes the same battery, of which I have spares and several D7000 accessories that would also work, too, and the two cameras would work in a similar fashion - less learning - well anyway - my guess is that a D610 will be out along with a D7200 this Fall.
Perhaps it will work better. I'll wait until Spring to find out.