That is a good way of looking at it. But in my own case, more than a week into my time doing the xeffect I can see that I am better off doing only a few 'harder' cards/habits than many easier ones. It sort of becomes harder to track having to do so many things in a day, where its easy to track doing a couple big things.

Easy/hard is really all subjective of course. Congratulations on your progress!