Hmm
Can we boil this down a to a couple sentences?
If your persona is link/created/is devices that have all the possible matrix attribute, I don't see a reason you shouldn't have access to them, assuming you are running in a mode(s) where all those attributes are active. (IE Online/Jumped in/etc).
I follow the RAW argument against it in general, and i can certainly understand anyone who wants to just say No simply b/c it's over complicated and RAW doesn't really account for it.
It's certainly a niche case, and should it become a common case I can understand folks getting nervous, but should such a thing ever happen I'm sure an offical ruling could be made and clarification given.
But that said, Dongles have been added to the game, and there is no doubt they add stats to things that don't regularly have those attributes. If that case exists then I accept that under RAI an argument other could as well. If a Persona is basically the sum of the hardware that make it up, which is concept i'm generally at peace with, then I'm inclined to allow this concept.