You can adjust the pixel shift as you see fit. We set the default to a setting that nobody would notice. Would anybody notice the movement of 4 pixels rather than two? Well, it is best to give some level of protection and let the consumer use the solution that fits best for that individual.
By all means, you can increase your protection by doing so.
I have mine set to 2-2-2 but I was wondering if 4-4-1 would be better (4 horizontal, 4 vertical, and 1 minute)?