I am in no rush to get rid of my ZF2 85mm Zeiss. Not just the cost, but the weight. I tested these lenses in other sizes, and yes, optically they are fantastic, but the idea of hiking around all day on trails, etc, with one of these lenses just doesn't appeal to me.
Also speaking of weight, I am heading on a trip, air travel, and at this moment, I am looking at only exactly what I need to save weight. I am taking 3, ZF 2 lenses with me, but I could not see taking three of them in the Otus versions. Even if I won the lottery, I would likely wimp out and wait for the carbon fibre body versions.
But for those who do have and use them, good luck and go for it.