Man vs. Machine is a bit narrow. If your Essence is under 2 then it's a better deal than Magic Resistance, but for Essence 2+ Magic Resistance is more cost-efficient. I do like that they stack.
Reduce, Reuse, Recycle is essentially a nuyen buff, especially at chargen. Let's use tricked-out cyberlimbs for example, which can run 100K each when they're fully kitted out. Getting those Used instead can save 25K per cyberlimb and also lets them break some Availability limits, since Used it easier to come by than Standard. (For example, you could get Armor 3 in every limb.) This means that the 10 karma quality could save you 100K in nuyen. 10K per karma is a bit rich, so this one might need to be more expensive or be limited in how many things it can apply to.
Efficient Integrator is an interesting idea. I think the pricing structure is a bit confusing; instead of having separate level costs, I think I'd make it one up-front cost (for the quality) and then the bonding costs that vary based on the grade of cyberware.
I don't like Hidden Potential as much as the other qualities. I like maintaining the limit of 6 Essence, but then making it easier to shoehorn things into that 6 Essence like Efficient Integrator does. I wouldn't be as open to qualities which effectively break the Essence cap, even if it can't ever be used to exceed Essence 6.
I do like the parallel with bonded foci that you use with Efficient Integrator. It seems like an approach that paralleled Initiation/Submersion could also find a home with these, i.e. treating these new additions as "metamagics" of sorts rather than qualities. Man vs. Machine's effect could start out at 1 and then grow with each subsequent "initiation". Efficient Integrator could be a second "initiation", Reduce Reuse Recycle could be a third (which would help keep it out of reach during chargen, when it it the most disproportionately powerful).
Edit: grammar