I'm not sure. If he removed Bannon because Bannon did something to piss him off, then, yes, it probably changes the power balance. If he removed him so that people would shut up about Bannon being in a position he should never have been allowed to be in, but still deals with him directly, then, meh.
That would be good if Trump himself weren't a hard-line ideologue.
And some immediate and serious military action followed by dire events in Syria have probably made it obvious even to Old Lard Ass that he needs to let the Joint Chiefs and NID handle national security.
So I wouldn't count Bannon out yet. Just moved. These people don't know what they're doing. It's probably going to be a while before everybody is settled in - if they ever get to that point.
...but hey, do what you want...you will anyway.
Yep, there he is.