Funny I find the bokeh kind of harsh in the last one but softer and more pleasant in the third. All nice picture though. Seems to be a good lens for you.
See Minolta MD 35-70mm f3.5 (Macro) Mod to f2.8-3.5 | Flickr - Photo Sharing!
Although I've not tried the mod.
That looks like a bit of bad luck or maybe the lens has had a knock that has caused decentering. I've had 4 samples in total and they all were sharp and contrasty, though every one of them was slightly unsharp at either left or right side when pixel-peeping shots from the NEX-6. The earlier Rokkor version (without macro setting) has somewhat lower contrast but is sharp nevertheless, my one sample at least.I have had my example of this lens since October last year. I have found it disappointing. Does any one know if there was considerable variation in quality at time of manufacture? My example is in very good condition, no haze or fungus but it is always just a little soft.