@Voss_
I do not really care whether it is a dm or storyteller who launches a new pc. I have played with every single one of our DM team when they were players, and I can (as can most vet players) see in playstyle and concept type who is who.
If a dm decides to step down for a while to pursue a concept, PLEASE do! Especially if they need time away from what I imagine is a rather taxing role in the community.
My ONLY issue, is that it can be very hard to figure out which storytellers or admins are currently active and who are not. That means both the administration/building part, and the IG active part. That aspect needs much better communication. If, say, @Echo is on pure building "duty" for a while, Ill know that I might be able to annoy her with reset requests, but I will not approach her regarding IG stuff. And if she is playing, just state it, even if it is a secret account.
I know there is an official rule that an admin or storyteller who is active (active in the story pushing sense) with a PC usually steps down from admin stuff in to avoid conflicts of interests. Which leads to the "complaint suggestion" of this thread. IMO its better to be upfront and honest about stuff, than trying to hide it away. That does not mean that you cannot or should not play by a different login. By all means do!
If there is a rule of thumb, that its either or and not both (playing and admin) notify us that you are inactive atm, to avoid silly misunderstandings or conflicts by needless deception, if that is causing grief within the community (which I havent experienced myself).