It really depends on what you're shooting.
A lot of your shots were wider and you got a good view of the subject, so smooth slow motion with some motion blur worked very nicely. However, I was shooting urban this past season and set up one particular shot where i had my 85mm pointed down at the ground, basically a really close up shot of the snow on the in-run. I was planning on doing a slow dolly forward right as the rider's skis passed through the frame, to make a nice tight shot with the intention of putting it in a sequence of shots. At the time, I was following that rule closely, so I shot at 720p60p at 1/125.
The shot turned out pretty cool, but the rider is pretty blurry as he passes through the frame. The viewer can't see the crisp detail of his skis and boots, which was the whole point of getting a close up. For the rest of the season I kept that in mind, and adjusted shutter speed accordingly if it was going to be a tight shot. Everything turned out much better after that.
Moral of the story: Sometimes the 180 degree rule (or rule of halves, whatever you want to call it) isn't the best way to shoot. And sometimes changing shutter speed in order to capture the image you want isn't that bad. Just gotta learn to judge the situation correctly.