Blocked practice v more open/random practice

The ultimate criteria of the success of these activities is the extent to which those skills transfer into the fluid, unpredictable environment of games. The more limited, static and prescribed a practice situation is, the less effective any transfer will be. The more open ended and dynamic the practice, the more chance there will be of skill transfer. However, the practice will look less neat and tidy, and there will be a greater level of error and failure. The irony here is that the practice that looks less effective, and messier, may well turn out to be developing a higher level of transferable skill.
- From Neil Rollings article 'Is Coaching overrated?'

Does this have implications on how you'll coach today?