For the personal sensor, what happens when it moves more than 50'/level away? Such as if you move farther away from it. Does it stay immobile? Disappear? Get dragged back in range? Teleport over to you? Make popcorn? Become a sentient, free-willed entity bent on world domination, yet unable to perform any actions that would advance those goals due to being a lowly scrying sensor?
Permanent Uplink lets you gains a bonus on a check as a standard action. So, obviously, it's not made as part of the check. Which begs the question, which check gains the bonus? I'd suggest making it applicable to any one qualifying check made (or started in the case of long action checks) within the next 1 minute or 1 hour or something.
Hack should be better at low levels. The Archivist gets it as sort of a throwaway class feature because, well, full casting. On a partial caster, it's competing in the same concept space as the Bard's Bardic Music. In addition to having numerous sources that boost that like nobody's business, the music is more reliable, versatile, and powerful at lower levels. With simple weapons, poor BaB, and few spells per day, you don't have much else to fall back on at low levels.
I think you can remove the WIP tag from this at this point.