I can appreciate the attention paid to advanced stats by some of the posters around here, because it does help to elevate the discussion --- but the intensity of which they are paid to by some borders on gimmickry. I hate to burst bubbles, but your logic is not in coherence with what you are trying to conclude.
Im in pursuit of a post-graduate degree, so Ive dealt with a fair amount of statistical analysis (no expert of course). Rule number 1 when it comes to stats is what theoretical questioning are the stats in explanation of, and what is the significance if at all. The theory has to be sound and grounded.
With that, what is the relationship with efficiency and what you are trying to explain? One would assume winning, correct? Your stats have little relevancy to that theory, given that Felton led knick squads have been pretty successful during his two stints --- this season of particular emphasis.
Efficiency is a variable of questionable importance here. A cursory glance of the stats and players provided in the link should tell you that your theory has major holes, and needs a more comprehensive approach, and far more intuitiveness. You cant use one variable as a representative of entirety, to the expense of others when proving a theory. You should know that, because when you do that you're just agenda seeking.
Now if you want to just talk efficiency, thats cool --- but whats the context? I could go more in depth, but I dont feel like it right now, and this post is too long as is.
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