another possibility of the blur, maybe the docks were causing vibrations? wind?
either way, I havent experienced the issue of shutter shake yet, but have only taken the camera out for two dedicated landscape sessions. 100% in focus, shake free so far. Even while shooting on the pier, since you can kinda feel the wave vibrations.
There is movement of the docks affecting the images for sure. However, the rusted pole in the sample crop is driven solidly into the riverbed and they should not move under given shooting condition. As for me, I was on solid ground - on a huge concrete box encasing drainage outlet. There was hardly any wind - in fact, I wish there were some more so that the cloud would move faster. The Gitzo setup has endured much windier conditions and I can attest it's not a factor this time around.
This is only my third day of A7R ownership so there is still a lot of getting to know the camera to do. Stay tuned.