Focus

I just had a thought. Does anyone else really hope that we see Erends first moments with a focus and Varl too. Anyone else hoping we see that.

It might be just a gameplay element but when you scan a machine, focus reveals everything about it, including weakpoints. Which is weird, because Focus is not created for doing this, it is basicly a phone. So, who is changing the User interface of focus for doing this? My guess is Hephaestus, but I do not think that he did this on purpose. He probably used the system for a reason (maybe he just didn't want to make a new system because it is not such a easy thing, it takes time), and somehow he managed to upload everything to focus network, maybe by an accident. So, what do you think?

Don't know if this was brought up already:

How could Sylens spy Aloy through the Focus?

Her focus had to be connected with his for that, but to my understanding a Focus is not in the eclipse network after activation, so how did he manage to get access to Aloys?

In HZD when Alloy overrides a Strider for the first time, she commented on how it connected to her Focus. Therefore a Focus is necessary to override a machine.

But the tribes in HFW don't have Focuses. How does this work?