You're kind of missing the point of this rotation.
This rotation is exceptionally fast and allows for the very fast mass production of two star synths when you have your Artisan Tool. The first paragraph stated this point, that is its target audience. If I was suggesting people who don't have full melds or their tools use this rotation I would have said that.
As for the Craftsmanship, adding +5 Craftsmanship on your Off Hand Tool makes a two star synth finish in two Careful Synthesis 2: that is worth far more than any amount of CP and Control in my opinion. I don't need to use Master's Mend II, which saves me 160 CP for other abilities. How much CP are you gaining on your Off Hand? 3? Bravo. So you gain 3 CP, I gain 160.
All of my Tools have Control IV and Craftsmanship III on. Nothing more, nothing less. This makes it possible to finish this rotation in seventeen steps in a very quick period of time. As I said above, manually doing this rotation (as I have it memorised) takes me just under thirty seconds. If I didn't have this Craftmanship, my rotation would require durability restore and it would bloat and complicate it. My point is this rotation is much more efficient and faster than pretty much every other two star rotation you'll find. But again, it is only for people who have fully melded their crafters and have their Artisan Tools. Think of it as a perk to putting all that effort in to be able to produce food in under half a minute.