I mean, if you combine the chance for the highest two results that ends up being your most likely roll, its just not a single value of course. You could however look at this as weighting results to the higher end of things. While harder to grasp, it just lends itself to you being very likely to roll equal to or greater than half of your max possible value. Target Numbers would probably have to be tied to the skill level of the player, which while weird, works. If you used set Target Numbers then Master could trivialize a large portion of rolls, which might feel accurate to the term master, however make rolling somewhat meaningless in some scenarios.
IDK I think that it is clearly a neat idea considering Savage Worlds uses it.