Rumor is that the old Inquisition Only codex is still valid, so if you wanted to run the servo skulls you theoretically could.
From a fluffy standpoint such a thing seems excellent, I personally painted up my own Scions as "Inquisition Stormtroopers." Overall non-scattering deep striking Scions could be quite useful, especially given that they do not care about difficult/dangerous terrain.
As for actual use, I've personally found Imperial Guard Veterans to be a little more points efficient. But... that's not really relevant here so I'll leave it there.
I do enjoy using my Scions as a fun unit.