Anyone can take any of the Matrix Actions from whatever device they have a Persona from.
The intention seem to be that you are not allowed to take actions (or use programs) that are linked to a matrix attribute unless you have that matrix attribute.
(Of course this is not clearly spelled out so you are free to rule this either way)
Both Trace Icon and Snoop, for example, are not linked but they both require Admin access (and illegally gaining Admin access require that you use linked actions). But if you are an admin of a network then it does not seem as if you need a cyberdeck to take the Trace Icon or Snoop action (which I think make perfect sense).
Having said that, I find it strange that Spoof command (which is an outside action that don't require that you take a linked action to first gain access) is not linked to Sleaze. So for the moment I agree that someone using a commlink or RCC (rather than a cyberdeck+cyberjack) would be allowed to take the Spoof Command action.
(Data Spike was also not linked, but they fixed that in the Aug errata).
If you own a Cyberdeck and an RCC RAW you're able to Hack and control Drones without much difficulty.
The intent seem to be that if you are using your Cyberdeck then you can't use all them nifty drone control options that a RCC offer and if you are current using your RCC then you don't have an A/S array and you can't hack stuff. It seem as if this have not changed since SR5.
RCC doesn't have a SIM Module that I could find
Riggers get a sim module if they install a control rig implant.
Slave drones to your RCC's PAN, put that PAN in your PAN of PANs.
I can't find any support for having more than one Personal Area Network at the same time?
Huh. RCCs aren't specifically mentioned as having SIM Modules, but p. 197, first paragraph, second column "...The Data Processing attribute is also used to determine Initiative when running in VR with the RCC."
Riggers get both their sim module and DNI from their control rig implant.
But yes, a rigger using a RCC (rather than a commlink or a cyberdeck) and that also does not have a control rig implant will not have the option to enter VR.
Same a regular user with an external commlink (rather than a RCC or cyberdeck) that is not upgraded with a sim module cannot enter VR. And also if the user does not wear trodes or having an implanted datajack (or cyberjack or control rig) then he can also not enter VR.
None of this seem to have changed since SR5.
Anyway, an AR Drone Rigger / Decker with some kind of meat initiative booster would be in fine shape using the RCC to form a Persona.
The intention seem to be that you have to choose if you are currently using a cyberdeck (and your matrix persona is getting it's matrix condition monitor track from the cyberdeck and your matrix persona have the option to use programs and and matrix actions linked to attack or sleaze) or if you are currently using a RCC (and your matrix persona is getting the matrix condition monitor track from the RCC and your matrix persona have the option to slave multiple drones to your PAN, share autosofts with drones, jump between drones directly, issue the same command to multiple drones as once and provide noise reduction...)
It seem as if this have not changed since SR5.